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Coach Directory

Spencer Dornin Head Coach

Coach Spencer was a member of the USA National Team from 2000-2007 (World Championship Team in 2005). He was a four year starter, All-American, and team captain at UC Berkeley before playing professionally in Hungary, Italy, and Australia.  After retiring from professional water polo, Spencer was an assistant coach for the varsity water polo program in Laguna Beach, California in 2007-2008.  He coached in San Francisco from 2008-2012 with the SF Tsunami master’s team and the Palo Alto varsity high school women’s team.
Since moving to Dallas in 2012, he has been coaching at St. Marks School of Texas and in 2016 he became the Head Coach at Pegasus.

Slobodan Stankovic Coach

Coach Boban hails from Belgrade, Serbia, where he has coached water polo professionally from 2009 through 2020 prior to joining the Pegasus Coaching Staff. In addition to coaching Water Polo Club Crvena Zvezda and Water Polo Club Belgrade, he also served as Assistant Coach to the Serbian U17 National team in 2017 and as Head Coach of the Belgrade Regional National Team Youth Selection. He has coached all age groups from 10U through 18U.


Prior to his coaching career he played professionally in Serbia and Italy as well as on the Junior National Team of Yugoslavia.


Coach Boban will work closely with Coach Spencer to ensure that our coaching staff maintains the level of excellence we expect as our programs continue to grow. While both coaches will coach all age groups, Coach Spencer will focus primarily on the 18U and 16U groups while Coach Boban will focus primarily on the 14U, 12U and 10U groups.

Peter Hudak Coach

Coach Peter was born and raised in Budapest Hungary, where he played water polo in all youth catgories and professionally. After his playing career he started coaching in 2005. He served as Head Coach of the Jamacain National Team before relocation to Dallas in 2013. He has been coaching all age groups with Trident Water Polo Club and serves as Head Coach of Dallas Masters Water Polo. He was also invited to serve as Head Coach for USA Waterpolo's South West Zone Junior Team in 2014.

Grant Miller Coach

Coach Grant was a starter for four years and All American at Pepperdine University from 2004-2008. He was also a member of the US Youth and Junior National Teams from 2006-2008. After graduating Pepperdine he moved to France to play water polo professionally. Upon his return he coachd for Foothill Water Polo Club (Southern California) from 2009-2015 covering ages 10-18.

He served as Head Coach at Damien High School (La Verne, Ca.) from 2010-2015 and as Head Coach and Program Director of Mesa Water Polo Club (Mesa, Az.) from 2015-2017. Currently he is the Head Coach at John Paul II High School in Plano, Tx.

Ashley Guapacha Coach

Coach Ashley was an ACWPC All-American, All-CWPA selection on Princeton University's Division I Water Polo Program. In her time at Princeton, Ashley's team won three CWPA Championships and made three NCAA Tournament appearances. Her senior year Ashley became the fifth player in school history to surpass the 200-goal plateau. 

Ashley grew up in Miami, Florida, playing for numerous South Florida Water Polo Clubs. Coach Ashley played at Miami Country Day School and earned back-to-back Most Valuable Player award and was a two-time member of the Florida First Team All-County Selection.  Ashley also later went on to coach the Raider Water Polo 18U Women's Team at Junior Olympics. 

Coach Ashley is a current member of the Argentine Women's National Team, whom she represented in the 2015 Pan American Games in Toronto, and the 2018 South American Games in Peru. She also works full-time as a technology consultant at KPMG.

Juan Pablo Guapacha Coach
Coach Juan was born in Colombia where he studied at Escuela Nacional del Deporte (National Sports Collage), obtaining a BS Sports Studies. He coached U-16 and U-18 Boyas WPC and Yubarts WPC, as well as the Valle B U-16 regional team in national championships, and served as assistant coach for the U-16 Colombian National Team.
Juan has been playing water polo for 18 years, and throughout his career he accumulated multiple Colombian National Championships, and represented the National Team at several international competitions including Pan American Tournaments, South American Games and the 2007 Junior World Championship.
Aleksandar Stankovic Coach
Coach Alex is originally from Serbia where he was the goalkeeper of the Junior National Team of Serbia and Montenegro, which won the European championship in 2001. He then relocated to the United States and played Division I water for BYU-Hawaii and St. Francis College. He received an honorable Mention All-American squad award in 2004. He was coached by some of the legends in the water polo world including Nikola Stamenic, Nenad Vasilevski, Nenad Manojlovic and current USA Men's National Team Head Coach Dejan Udovicic.
Zack Cleveland Coach
Coach Zack  played Water Polo for Plano West Senior High School from 2011-2012. During this time he also played with the Spartans Water Polo Club in Dallas and attended one Junior Olympics with the 18U team. He attended St. Francis College in New York City where he played NCAA Division 1 Water Polo as a goal keeper from 2013-2017. During his time on the team they made one NCAA Final Four appearance. He has helped coach with several clubs including Thunder Water Polo Club and Bryan Adams High School Water Polo Club. 

After graduation,   Zack moved back to Dallas and now works as an Investment Analyst at Crow Holdings Capital.

Luis Gonzalez Coach

Coach Luis was born in Venezuela where he also started playing water polo. He now has over 30 years experience as a water polo player, as he played at several national tournaments, as well as internationally for the Student Water Polo Club Zurich in Switzerland , and for the Jewish Water Polo Club in London, Great Britain. He particapted in the Master Pan American games in Orlando, FL. 2013 representing his home country as well as the I   nternational Herbert-Esters Water Polo Tournament.    From 2003 to 2007 he played for Dynamo Water Polo Club in Atlanta , until he relocated to Dallas where he has joint the Dallas Water Polo Club.

In addition to his playing career Coach Luis had the opportunity to Coach for 6 years in Venezuela and for the last couple of years in Dallas.

Carl Matthews Coach

Carl Matthews is a Southern California native with twelve years of experience playing water polo.  After attending secondary school at Esperanza High School, Carl went to Long Beach City College to study History and completed two years of collegiate water polo and swim.  He then transferred to the University of Redlands where he earned his BA in History and completed his final two years of Division III water polo in 2020. 
Carl has six years of coaching experience, coaching four years of youth water polo for Elite Aquatics Sports Team in Anaheim, California and was hired to be the assistant coach of the men's water polo team for Yorba Linda High School back in 2017 and eventually became the head Varsity coach for YLHS in 2020.  Carl and his wife moved from California to Texas in July of 2021 and plans on becoming a high school history teacher and water polo coach."
Spencer Hamby Coach

Spencer grew up in Granite Bay, California where he started playing water polo at age fourteen after being a swimmer and a basketball player. At age 17 he was ranked 12th in the nation for the 100 butterfly. From 2006-2012 he played for the Cadet and Junior National Teams that won gold medals at the 2006 Cadet and 2008 Junior Pam American Games and in addition went to two Junior World Championships (Croatia, 2009, Greece, 2011.)

Spencer was recruited by Pepperdine Univeristy and played all 4 years from 2009-2013. He was a team captain and an All American in 2011 and 2012.
During his time at Pepperdine he coached the Women's Club Water Polo team, as well as the 16U Malibu Sharks. I was also a counsellor for the Terry Schroeder's Malibu Water Polo Camp.

After college Spencer moved to Germany and played professionally from 2013-2020. From 2015-2017 he played for the Berlin team, Wasserfreunde Spandau '04.

Ursa Bezan Petric Swim Coach
Ursa is from Kranj, Slovenia where she was many times the Slovenian record holder in different age groups in the 100, 200, and 400 freestyle. She swam on the Slovenian team in the 2012 London Olympic Games helping her team place 12th in the 4x200 freestyle relay.  Ursa also competed on several European and World Championships.
She arrived in Dallas in 2013 to swim for the SMU Mustangs where she placed in the top three in the AAC, was a NCAA qualifier and a team captain her senior year. She graduated with summa cum laude at SMU with a BS in Applied Physiology and Health Mgmt and a minor in Chemistry. She has been coaching at the SMU Dedman Center and for the Dallas Aquatics Masters. She plans to apply to medical school in 2020.
Jan Petric Swim Coach
Coach Jan is originally from Kranj, Slovenia where he still holds multiple national records. He competed at multiple European and World Championships on both junior and senior levels. Jan continued his swimming and academic careers as a Division I student-athlete at Purdue University in Indiana, where he was selected the captain of the swimming and diving team his senior year. After graduation from Purdue in 2015 and before moving to Dallas in 2018 he was a swim coach for wide variety of swimmers, from beginners to World Championship medalists. Currently, Jan is also studying Prosthetics and Orthotics at UT Southwestern.
Eva Gliozeryte Swim Coach

Eva was born and raised in Lithuania where she started swimming at a very young age. At age 14, she made a final at European Youth Summer Olympic Festival and finished 8th in 200 freestyle. She held national records in 200, 400 freestyle and 50 backstroke in different age groups and also competed at World Junior Swimming Championships where together with three other Lithuanian teammates won a silver medal in 4x100 mixed medley relay. On top of that, Eva continued her career in the United Kingdom and competed at European Swimming Championships in 2014. In 2016, she came to the USA to swim for Southern Methodist University’s Swimming and Diving team and took 4th at NCAA Swimming Championships in 50 freestyle. She taught swimming for 2 years at Dedman Center for Lifetime Sports and joined the Pegasus coaching staff in 2020.

Weston Gadbois Swim Coach

Coach Weston learned to swim later than most.  At the age of 14, he joined the Aggie swim club. He graduated high school as a regional qualifier in the 100 breast, 200 IM, and 100 free. As a walk-on his freshman year at the University of the Incarnate Word, Weston made the CCSA All-Academic team. Transferring to Southern Illinois University, where he swam for another four years, he earned MAC All-Academic in his final three years and competed as a scholar athlete his final two years.  Weston is currently working on his MBA with a concentration in Healthcare Administration with Texas A&M Corpus Christi. He plans to one day work in hospital administration, hoping to improve local healthcare systems to the best of his abilities. In the meantime he is coaching with Pegasus Aquatics as a swim coach, as well as working as a Club Administrator, along with coaching for the North Dallas YMCA.

Martina MoravcovaValko Swim Coach

Martina was one of the leading female swimmers in the world. She represented her native country of Slovakia at
five consecutive Olympic Games (1992-2008) and many World and European Championships. She is a 2-time
Olympic silver medalist in 100m Butterfly and 200m Freestyle, missing the gold by mere 0.08 seconds. In addition,
she reached the Olympic final four times. She rarely failed to win a medal at a major championship. She won total
of 67 individual medals: 2 Olympic silver medals, 22 medals from the World Championships and 43 medals from
the European Championships. She broke 3 World, 16 European and 207 Slovak national records. She also won 105
gold medals at the FINA World Cups and become the overall winner of its World Cup Series three times. She is also
4-time US National Champion and 10-time US Open Champion.

In 1995, Martina accepted an athletic scholarship at SMU in Dallas. In only four and half years, she completed two
degrees, a Bachelor’s in Business (1998) and a Master’s in Economics (2000). The 1999 NCAA Swimmer of the Year
and Honda Award Winner for Swimming & Diving, Martina dominated the collegiate swimming in the late 1990s.
She won 10 individual NCAA titles during her career at SMU, the second winningest in the NCAA history. Overall,
she won 14 NCAA titles as a Mustang, including four straight 200 free titles. Martina ended her collegiate career as
a 25-time All-American, winning amazing 26 conference (SWC & WAC) titles. Some of her school records are yet to
be broken. She was inducted into SMU Hall of Fame in 2008.

Upon graduation from SMU in 1999, she signed an endorsement contract with TYR Sports and became the face of
the brand for 8 years. During that time, she taught stroke clinics and inspired many young swimmers across the
US. She also served as a member of the FINA Athletes Commission for 8 years.

She retired from competitive swimming in 2012. During summers she runs her successful swim camps in Slovakia.
She coached for Dallas Mustangs, teaches private stroke lessons and coaches for Pegasus Masters. She has two
young children, daughter Karolina who swims competitively, winning the 2021 Texas Age Group Championships.
Her son Michal also swims competitively and enjoys playing tennis. She is married to Martin Valko, a partner at
Dallas-based immigration law firm of Chavez & Valko, LLP.
For more detailed information, please visit: or follow her on Instagram

Frederica Kizek Swim Coach

Frederica is from Houston, Texas and swims for SMU Women’s Swimming and Diving team. She is a senior and plans to attend graduate school after completing her B.S. in Biological Sciences this year. In 2022, Frederica earned All-Conference Honors in the 1650 and 500 freestyle and was the AAC Conference Champion in the 1650. She started coaching for Pegasus in 2022.

Erin Trahan Swim Coach

Erin grew up in Crowley, Louisiana beginning her elite swim career competing for Crawfish Aquatics under the coaching of Thomas Clavier. While competing under Clavier, Erin became state champion and set state records in multiple events, most notably the 100 fly composite Louisiana High School state record her junior year.

She continued her swim career at Southern Methodist University where overall she collected 21 All-Conference Honors - 6 being Individual Conference Championships. She also qualified for the NCAA Championships her junior and senior years in the 100, 200 fly and 50 free, and earned All-American Honors her senior year in the 100 fly. She was also selected American Athletic Conference Most Outstanding Swimmer at the 2019 American Athletic Conference Championships, and SMU awarded her Student Athlete of the Year for both 2018-19 & 2019-20 seasons.

After graduating, she trained for a year for the postponed 2020 Olympic Trials in San Diego, California for the College Contingency Team (CCT) alongside Team Elite under the guidance of Olympic head coach David Marsh. While in San Diego, she found her second passion in the sport swimming - coaching. She became an age-group swim coach for Coronado Swim Association. After completing her year of training in San Diego, Erin moved back to her Dallas home and to continue her coaching career with Dallas Mustangs and now Pegasus Aquatics

Bobby Patten Director of Swim Training

A native of Colorado a High School All American, Patten earned a scholarship to compete at Southern Methodist University. He was a five-time NCAA division I All American. He was a high school All American all three years of his high school career. During his age group career Patten set over 100 Colorado State Records, competed in five Jr. Nationals and Two Sr. Nationals and the 1980 Olympic Trials. Patten accepted a scholarship to swim for Southern Methodist University with Coach George McMillion. While at SMU Patten was a five-time NCAA All American and represented the United States at the 1982 World Championships. In the 1983 college season Patten swam the butterfly on the 4X100 medley NCAA Championship Relay, which set the American and US Open record. This record was made possible by a 51 second breaststroke swum by Olympian Steve Lundquist. Patten said the freestyler, John Spaulding, and I had a race plan, “don’t false start.”

After college Patten continued to compete and represented the USA at the Pan Pacific games in 1987. While in college, Patten began coaching masters for The Lone Star Masters Swim Club. In 1999 Patten was Co-Founder of the Dallas Aquatic Masters or DAM. As a master swimmer he has set numerous world and national records in several events including the 200 butterfly, the 400, 800, 1500 freestyle, and 10K swim. Patten is an experienced open water swimmer and has been the overall winner of the Waikiki Roughwater Swim, the Alcatraz Sharkfest Swim, and the Lake Minnetonka 5-mile Open Water National Championship Swim. He was named United States Masters Swimming coach of the year in 2010.  Patten is finishing his twenty-first season as the Head Coach for The Hockaday School.

Stephen Barnicoat Masters Swim Coach

Steve is a native of California (Mission Viejo), he was a 4-time High School All American, National High School Champion and Record holder (100 Backstroke - 1980). In college he was a 3-time NCAA All-American at UCLA (1981)& SMU (1984 & 1985). On the national scene he was a 3-time US National Champion (200 Backstroke)and represented US on various national teams including the 1980 Olympic Team & 1982 World Championship team.

Steve has been involved with Masters swimming since 1987 with Dallas Aquatic Masters, an Orlando Masters Team, and currently Pegasus Aquatic Masters. He personally does various open water swims, preferring the tropical climates of Cayman & Maui, for his swims.

On the professional side, he has just recently parted with his employer of 15 years, EmCare (an Emergency Medicine Practice Management Co) and was the Director of Financial Planning & Analysis. And he continues to have a Medical Consulting (Financial) company since 2007.

Steve lives in Lakewood. He has two boys Andrew and Thomas. When he is not coaching masters swimming he is often seen on the golf course. As a result of his passion, for masters coaching and volume, he has been referred to as "Coach Yell" from time-to-time.

Jane Cole Masters Swim Coach

Janie is from Glastonbury, Connecticut and started swimming at age 8. She swam for Baylor University and then attended Baylor Medical Center. Her swimming career really took off when she joined Dallas Aquatic Masters in 2005. Janie has been very competitive in Masters Swimming and is consistently ranked in the USMS Top Ten in butterfly and freestyle spring events. She has swum on several USMS and Masters world record-breaking relays. Janie is a nurse anesthetist at Presbyterian Hospital. She started coaching Masters in 2014 and joined Pegasus Aquatic Masters in 2020.

William Glasstetter Masters Swim Coach

Billy is originally from Penn Hills, Pennslyvania, and came to Dallas to swim for SMU. He was captain of the SMU Swim Team in 1979 and was a 3 time NCAA Division I All-American and a 1976 Olympic Trial finalist. He was 5-time member of the USA National Team and was inducted into the Pennslyvania Sports Hall of Fame in 2008. He is the owner of the White Rock Construction, Inc. and is married to Carol and they have four children. Billy started coaching Masters swimming in 2009 with Dallas Aquatic Masters and joined the Pegasus coaching staff in 2020. 

Liana McStravick Masters Swim Coach

Liana was born in Mountain View, CA., and started swimming competitively at age four. As an age-grouper, she was a consistent Junior National and National qualifier in mid-distance and distance freestyle events, winning the 200 Free at the Alabama State H.S. Championship. Liana swam distance freestyle events for SMU 1985-1989 and was Team Captain 1988-1989. She starting coaching Masters swimming in 2001 at Dallas Aquatic Masters and joined the Pegasus coaching staff in 2020. Liana specializes in breathing and stroke fundamentals for beginning swimmers and distance and open water training.

Marylyn Toledo Masters Swim Coach

Marylyn is a native of Dallas, Texas and grew up swimming with the Dallas Mustangs and at Parish Episcopal. She was part of 4x TAPPS state championship teams at Parish and won 8 individual state titles. Marylyn went on to swim at the University of Texas at Austin and was part of 2x Big-12 Championship teams. She was also named to the All-Academic Big-12 first team, Big-12 Commissioner's Honor Roll, and the University of Texas Athletic Director's Honor Roll. Marylyn competed at the 2012 US Olympic Trials in the 100m Butterfly.

Her coaching career started when she was a swim instructor and coached the Royal Oaks Country Club swim team (ages 5+) for 7 summers during high school and college. Since then she has been coaching Masters swimming since 2016 and is also the Assistant Varsity Swim Coach at The Hockaday School. In addition to coaching and doing social media/marketing for Pegasus she also works full-time in advertising.

Lynn Morrison Masters Swim Coach

Lynn grew up swimming in Tucson, Arizona.  She attended college at Arizona State and was an All-American in 1973 as the freestyle leg on their 200-medley relay team.   She has lived in Dallas since 1977 and has been swimming masters since 1981.  Lynn is a Certified Level 3 Masters coach, with special focus on fine tuning the aspects of sprint training.  This has paid off well, yielding multiple Top Ten, American and World Records.  Her coaching style is one that encourages FUN … and leaving each workout with both a since of accomplishment and desire to come back for more!

John (Carl) Dunlap Masters Swim Coach

He learned to swim at the age of four and excelled in several youth sports before committing to swim on his high school team in Ohio. After two years in Ohio his family moved to Michigan where Carl was captain of the Owosso Trojans swim team his senior year. He also participated on the syncronized swim team. As a young adult he moved to Dallas for business and joined Masters swimming for fitness and became a better swimmer than he was in high school. He has competed in USMS competitions in the sprint events. Through Masters swimming he learned open water swimming and has traveled to many tropical destinations competing in open water events. Carl is certified in the USMS Adult Learn to Swim Program and has taught swimming to adults with a fear of water to swim. Carl met his wife, Laurie, through Masters swimming, and is the owner of Dunlap Masonry Products, and has three adult children.

Eliana Yellin Masters Swim Coach

El is from Mission Viejo, California. She swam 13 years for the Mission Viejo Nadadores, reaching their senior level national team. She then moved to Texas to swim for the SMU Mustangs for all four years of college. She was the SMU Women's Team Captain and scored as a distance swimmer at the AAC Championships every year. She also served as SAAC President and led her fellow student-athlete body in community service events, and became a voice to administration. El earned her B.S. in Sports Management and B.A. in Psychology from SMU in 2019, and an M.S. in Sports Management in 2020. El has held various coaching positions ranging from 5 year olds to masters swimmers, thoroughly enjoying being on deck and pouring back into anyone in the pool. El currently works for Panini America in the sports world and will always have a passion for the pool, aiming to always find a way to serve on deck. Pony Up!

Kirk Stackle Swim Coach, Masters Swim Coach

Kirk grew up in San Diego. After exceling in age group swimming he head to Austin, Texas to swim for Eddie Reese and Kris Kubik at the University of Texas. Under the program, Kirk enjoyed great success winning 3 team and 3 individual national championships, become a 16 time All American and achieving a berth on the 1988 Olympic team in the 200 breaststroke. In 1990, Kirk held his highest ranking as second in the world in the 200 breaststroke and third in the world in the 100 breaststroke after an outstanding Goodwill games showing. He is a ASCA level 2;3 certified coach as well as a USMS level2 certified coach and started coaching with Pegasus in 2022.

Alex Shozda Masters Swim Coach

Alex is from Schaumburg, Illinois. He grew up swimming age group for the Palatine Tiger Sharks and
Hickory Willow Dolphins where he reached their senior level national teams. Alex swam with the
Badgers at the University of Wisconsin in Madison during his first year in 2014. In 2018, he graduated
with a degree in mechanical engineering and enjoys applying those principles to sport when he can.
Alex has been helping various athletes with strength and conditioning training since 2020 and
swimming with the Pegasus Masters group since 2021.