John Clark
Head Coach - Gold Coach
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Coach John Clark has over 16 years of coaching experience
including summer league, high school, and club swimming. Beginning
in 1991, he coached the Lochearn Monster Swim Team. He later went
on to coach the CATY Barracudas Swim Team for 11 years. During his
tenure, the team grew by 40%, growing from a total of three swims
at Y Nationals in 1996 to over 40 swims and multiple finalists in
2004/2005.
Coach John also coached the Mount DeSales varsity swim team from
1999-2007. While there, he helped elevate the team from the bottom
of the league to several top three finishes at IAAM championships,
as well as two top four finishes at National Catholic
Championships.
Coach John has a deep passion for competitive swimming and
is well versed in stroke technique, motivation, and race
strategy. He is committed to developing not only swimming
ability, but the character and future of all the young men and
women he coaches.
Coach John graduated from Towson University in 1999 with his
degree in English.
Nina Groseclose
Asst Head Coach - Silver/JAGI Coach
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Coach Nina joined Mariner Swim Club in the fall of 2015.
She is a former swimmer for MSC and Bolton Hill Swim and
Tennis. She began competitively swimming at the age of 8, and
continued summer swimming until she was 18. In high school and
college Nina ran cross-country and track and field for her school
teams. She continues to run competitively in local races. Outside
of the pool, Nina is a high school chemistry and physics teacher at
Lake Clifton High School in Baltimore City.
Hollie Rawl
JAGII Coach
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A lifelong swimmer, Coach Hollie first dove into the pool
competitively at age 4 and continued swimming throughout high
school, earning multiple varsity letters, team and coaches’
awards, and earning the honor of team captain. In college she
switched to Women’s Collegiate Water Polo, where
she earned All-Academic accolades and team captain.
Throughout high school and college Hollie actively instructed
swim lessons and coached competitive swim teams. A career move
after college relocated her to Maryland (Baltimore).
Coach Hollie joined the Mariner Swim Club coaching staff in
Summer 2016, diving at the chance to become re-involved in the
world of swimming. It’s been an incredibly fun and
rewarding adventure thus far and she's excited to see what
this season has in store.
Coach Hollie's goals for JAG II include: Improvement in stroke,
technique, and race performance; 100% effort at every practice;
personal best times for every swimmer; developing healthy habits;
having fun while working hard.
Sarah Lloyd
Bronze Coach
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Coach Sarah joined Mariner Swim Club in the summer of 2018. A
native of Hightstown, NJ Sarah grew up swimming for Peddie Aquatics
Association and then Peddie's high school team, as well attending
Sectionals meets across the country during her high school years. A
2017 graduate of Division III powerhouse Kenyon College, Sarah swam
the 400 IM, 500 free, and the 1650 free, finishing in the top 20
for each event at the 2015 NCAA DIII Championship meet in
Shenandoah, TX. She is a 2-time NCAA All-American and a 4-time NCAA
Academic All American, as well as Kenyon Ladies' Swimming team
captain for her senior year. Currently in her second year of the
UPenn Fellowship, Sarah teaches 9th grade history at Gilman,
coaches Gilman Water Polo and Swimming, and is working on a
Masters' in Education.
Laura Groseclose
Minis Coach
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Coach Laura is happy to be joining the team of coaches for the
Mariners. Being a former swimmer and a parent of swimmers
from Mariners, it is great to be experiencing another side.
Her love of swimming has been life long. Coach Laura
believes it is the best sport for overall conditioning of
one's body that can be picked up throughout one's life. Her
competitive swimming began at Bolton Hill Swim and Tennis as a
young child specializing in breaststroke, "the best-stroke". Though
her college did not have a swim team she continued to swim and
integrate it in her training for marathons as well as triathlons.
Outside of Mariners, Laura teaches at the Odyssey School where
she has also coached the cross country team as well as assisting
with the squash team. In her free time she enjoys exercising,
reading, and spending time with her three most favorite people!
Ashlyn DeRoche
Coach
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Coach Ashlyn started swimming at the age of 9. She was part of
a summer league at Thomson Country Club, and swam for Burbank YMCA
Bluefins for seven years. She swam all four years during high
school at Austin Preparatory School in Reading, MA where
she qualified for sectional and states all four years. Ashyln
was a three time CCL All Star and team MVP her senior year.
Ashlyn swam all four years of college at Regis College in Weston,
MA where she was a member of two relay teams that broke 25 year
records. While at Regis College, she was captain of the
women's team, qualified for ECAC twice, GNCA all conference team
twice, NEISDA all conference team all four years, and NEISDA female
swimmer of the week during her senior year. Ashyln has experience
coaching and teaching swim lessons, was at one point head of swim
lessons where she had a summer lifeguarding job.
Luke Watling
Coach
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Coach Luke is currently an undergraduate student at Johns
Hopkins University pursuing a major in Psychology with aspirations
of being a clinical/mental health therapist. Luke grew up
in Northern Virginia where he swam for a summer team starting
at age seven. He began swimming competitively for a year-round
team at the age of thirteen through his senior year of high
school. Luke's favorite events are breaststroke, distance
freestyle, and IM. He served as a captain for his high
school swim team. Luke has been coaching for summer teams
since his freshman year of high school. He's been an assistant
coach for the Four Seasons Swim Team in Herndon, Virginia for three
years. Luke is very excited to get more involved in the world of
swimming and is extremely thrilled to join the Mariner Swim Club
coaching staff!
Genny Fitzgerald
Coach
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Coach Genny is a lifelong swimmer, coaching off and on since
2003. She started out assistant coaching the Ocean Pines
Hammerheads in the summer of 2003. From there she went on to become
part of the coaching staff at the Mid-Delmarva YMCA in Salisbury
while she attended college at Salisbury University. She left
coaching to start her career as a teacher for Baltimore city public
schools. She then went on to get her Masters in Reading from Towson
University and graduated in 2013. She now works as a Reading
Specialist at Campfield Early Learning Center, a Baltimore County
Public School. She has been the head coach of The Lochearn Monsters
swim team in Randallstown for 5 summers, in addition to teaching.
Her son, Jonah (age 7), is also a swimmer for the Mariners.
Swimming is a passion she was happy to pass down to her son!
Sarah Locke
Swim School Director
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Sarah-Margaret joined MSC in the Fall of 2018 as our Swim School
Director! She hails from Marietta, Georgia, and is currently
enrolled as an Undergraduate at Towson University.
Sarah-Margaret is currently a member of the Women's Swimming
and Diving Team at Towson University.
