Our Coaches


Head Coach – Mark “Mook” Rhodenbaugh – National Group

Mook started his coaching career with our swim club in 1986 and has been the Head Coach since 1989. He is originally from Cincinnati, Ohio, where he started age group swimming with the Cincinnati Pepsi Marlins at age 6.

Mook was an Assistant Coach at SMU from 1988 - 1991. He was voted USA Swimming Southwestern Coach of the Year in 1989 and 1991 and USA Swimming North Texas Senior Coach of the Year in 1995 and 2000. He was recognized by the United States Olympic Committee as the Pentathlon National Coach of the Year for 2004. In 2007 he was selected as an assistant coach for the USA Swimming Junior National Team.

Mook is a graduate of Southern Methodist University (SMU). As a member of the SMU Mustang swim team he achieved All-American honors and was named Captain of the team his Senior year. He swam on the SMU medley relay team that once held the American record.

He was world ranked in backstroke, and was 5-time American Champion in the mid-1980s. He represented the United States in International Competition every year from 1981 to 1988.

Mook was inducted into the Buddy LaRosa High School Sports Hall of Fame (Cincinnati, Ohio) in August 1997.


Head Age-Group Coach – Doug Moyse – Gold & Silver Groups

Doug Moyse came to the Dallas Mustangs in 1999. Prior to joining our team Doug was with the Tom Landry Sports Medicine and Research Center. As Aquatic Fitness Coordinator, he was in charge of a variety of aquatic programs and assisted with the coaching of the Masters Swim Program. Before joining the Landry Center, Doug was athletic and aquatics director at the Lincoln City Club and the Signature Athletic Club.

Prior to relocating to Dallas, the Louisville, Kentucky native was an age-group and strength coach for the Lakeside Swim Club. The strength and dry land programs developed for the national team by Doug had an impact - one of the national team members was "Madame Butterfly", Mary T. Meagher, former world record holder in the Women's 200 Meter Butterfly.

Doug has a Bachelors degree in Business from Wright State and a Masters degree in Sports Administration from Eastern Kentucky University.

He is part of a current FINA World Masters Record 200-Meter Free Relay (short course) record which has stood for over seven years. Coincidentally, Dallas Mustangs Head Coach Mook Rhodenbaugh is also on the relay.


Lia Oberstar – Gold Group

Lia joined the Dallas Mustangs coaching staff in 2002. Lia is a graduate of SMU with a triple major in Anthropology, Latin American Studies and Spanish.  She is currently completing work on her Masters in Anthropology.  Lia hales from Indiana and started swimming at the age of six with Ft. Wayne Aquatics.  She was a 5-time Indiana High School swimming champion.  While at SMU Lia received All-America recognition 16 times and was a 4-time NCAA champion.

During her career, she was twice U.S. record holder – individually for the 200 back and as a member of a 400 medley relay that set the U.S. record at the 1997 World Championships. Lia was a member of the U.S. National Team from 1996 –2000 and represented the United States in international competition numerous times. In addition to her coaching duties with the Mustangs and work on her Masters, Lia coaches with Dallas Aquatic Masters.


Karen Miller – Bronze Group

Karen joined the Dallas Mustangs coaching staff in 2003.  She is a California native and started competitive swimming at the age of 9. Karen has her bachelors degree in Accounting from San Jose State University and her MBA in e-business from the University of Phoenix. Karen is a member of the Dallas Aquatic Masters, has coached masters swimming at the North Dallas Athletic Club and is the Head Swim Captain for the North Texas Chapter of the Leukemia Society’s Triathlon Team in Training.


Jeff Veazey – All Groups at Knights of Columbus

Jeff Veazey has been coaching and teaching swimming off and on for over 30 years and joined the Mustang's coaching staff in 2007.  In addition to coaching for the Mustangs, Jeff coaches Bishop Lynch High School and the Knights of Columbus summer league team.

His greatest thrill in swimming (other than watching his sons Caleb, Liam and Jonas swim) was placing in the top ten at the 2000 Masters Long Course Nationals in five events. 

The part of coaching he loves most is helping young swimmers learn and improve their strokes and sparking their love for the sport of swimming.

Sean Sell – Red, Blue & Silver Groups

Sean joined the Dallas Mustangs coaching staff in 2009.  Sean was born in Mountain View, California and started swimming on the neighborhood swim team at age 5.  Six years of his swimming career was spent at Loos with Dallas Aquatic Club which eventually merged with the Dallas Mustangs, and was a Jr. National Qualifier at age 15.  Sean has extensive competitive experience which includes representing the United States in international competitions in Europe and Asia.  His experience also includes swimming under Jack Simon at Lewisville Aquatics.  He is currently swimming unattached with US Masters Swimming.  Sean has coached privately for many years and for the USA Swimming team in Colorado Springs.  Sean holds a BS Business from UTD and an EMBA from SMU.

Per Nylin

Per Nylin joined the Mustangs staff in Spring 2010. Per had an impressive swimming career competing at the international level.  

Per is originally from Sweden and was recruited to the United States to swim for SMU. He swam for SMU for four years and is an All-American. He is also a seven-time Swedish National Champion and represented the Swedish national team at various meets and training camps from 1999 to 2007.  In December 2007 he was part of the 200 scm freestyle relay team which won European Championships and set a new World Record.  Per's life time bests in  50y free and 100y breaststroke are 19.7 and 53.0 seconds.  

Per has an undergraduate degree from SMU in Business Management and Economics and a MBA from the University of Dallas in Corporate Finance. During the course of his MBA studies, Per also worked as the Assistant Coach at Ursuline Academy 2009/10. 

Griffin Marshall – HP Bronze & Silver Groups

Griffin Marshall joins us in his first year coaching the Bronze and Silver groups at Highland Park High School. Griffin is not only a current coach for the Mustangs, but also a former swimmer! He swam for the team in high school under Coach Mook. He attended Miami University in Oxford, Ohio with a swimming scholarship. After graduating in 2007, he coached for the Cincinnati Marlins for 2 years before moving back home to Dallas.

He currently also works for a morning radio show.  Griffin is very excited to back with the Mustang family!

Beverly Stone

Beverly  Stone began with the Dallas Mustangs in September, 2010, after being an assistant coach for Irving Swimmers.  Prior to coaching Irving, she assisted with coaching a summer TAAF team and stroke training lessons.  Beverly’s swimming career began early at the age of five in South Texas.  Traveling throughout the state with her two sisters and brother, her childhood career culminated in being a member of the TAGS state record setting relay at the age of 12. Her most recent swimming achievement was placing in the top 10 in two events at US Masters Long Course Nationals in 2009.

An active triathlete at Texas A&M, Beverly graduated with a B.S. in Chemistry. She worked in the chemical industry for nearly a decade, and was awarded her MBA from Texas A&M Corpus Christi in 1996.  After working in the corporate world, she earned her Texas teacher’s certificate and taught Chemistry at the Jack E. Singley Academy in Irving for five years.

She is married,  and has two daughters:   Emily, age 15, who swims for the Dallas Mustangs and Marcus High School, and Sarah age 13, also with the Dallas Mustangs. Beverly is currently an active Masters swimmer at Irving, and continues to compete in swimming competitions and local triathlons.