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The Team

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Our dedicated coaching staff brings a wealth of knowledge and experience to the field, providing personalized instruction and guidance to help each player reach their full potential. Through innovative training techniques and state-of-the-art facilities, we aim to elevate your game to new heights.



Sean Profile

Sean White is a former professional baseball player with a distinguished career both on and off the field. Growing up in Mercer Island, Washington, Sean showcased his pitching skills at Mercer Island High School. Opting for collegiate baseball over an immediate professional start, he attended the University of Washington.

As a Husky from 2000 to 2003, he excelled as a starting pitcher, earning All-Pac-10 honorable mentions in both 2002 and 2003. Over four seasons with the Mariners (2007-2010), he maintained a win-loss record of 4-4 and an ERA of 4.16. His peak performance in 2009 included a 2.80 ERA across 52 outings, earning him the title of Mariners’ 2009 Unsung Hero by the Baseball Writers Association of America.



Andre Marshall

Andre Marshall, outfielder and switch hitter, played for the Washington Huskies. Drafted by the Philadelphia Phillies, he went on to play minor league baseball for seven years.

Been a hitting instructor over 20 years and have had hundreds of HS players that went on to college and professional baseball. Coached at Mercer Island HS for 12 years and won 2 state championships.

Coached outfield hitting and Baserunning at Mercer Island HS



Nikki Visone

Born and raised in Las Vegas, NV. Nikki Visone graduated from Cimarron Memorial in 2013. After his Freshman year at Mt. San Jacinto CC (CA) he transferred to Madison, WI to finish his eligibility at Edgewood College posting a career .400 OBP.

Transitioning to coaching, Coach Visone took an assistant job in Las Vegas at Legacy High School. At the conclusion of one season he was offered an assistant position at Salem State University serving as the hitting, catching, and 3rd base coach for the 2020-21 season. The Vikings won their first Conference title since 2016 advancing them to a regional in Whitewater, WI. 

The following summer Coach Visone was an assistant for the Hoptown Hoppers in the Ohio Valley League. Concluding a successful summer with players from all collegiate divisions, Coach Visone moved to Missouri to be on staff at Missouri Valley College (NAIA). 

Nikki is currently a graduate assistant at Seattle University (D1), and in charge of baseball operations for Boost Baseball. 


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Former Atlanta Braves MLB Scout

Played Collegiately at San Diego State University 1988 - 1990

Played Professionally for the Taiwan, Taichung Blackhawks.

Basehall Camp Director for Seattle Mariners, Mike Blowers and Julio Cruz.

Association of Professional Baseball Player's of
America * Lifetime Member #5854

Invented the Baseball Retriever Fungo Bat / with Bill Nye " The Science Guy"


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After graduating in 2014 from Yukon High (OK), pitched for Cowley College (KS) won a conference championship and played in the D1 JUCO WS. In 2016 transferred to Okla. Christian Univ and was selected as an All-Conference Honorable Mention.

Posted a career 3.77 ERA in 3 professional seasons in Independent Leagues (Parter MLB Leagues)

Currently 3+ years of experience training athletes to be more efficient in their movements and patterns.
2 years coaching college baseball in the PIL and WCL leagues with the Redmond Dudes.

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