Co-Founder & Hitting Coach

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.

Andre has been a hitting instructor for over 20 years and has had hundreds of high school players go on to both college and professional baseball. For 12 years, Andre coached at Mercer Island High School, where he won two state championships and coached outfield hitting and baserunning. 

Co-Founder & Pitching Coach

Sean White

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.

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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.

Director of Baseball Operations 

Dan Rickert

Dan Rickert graduated from Tyee High School in 1997. While at Tyee, Dan earned 1st team All-Seamount League honors as a middle infielder his Sophomore, Junior and Senior seasons. After graduating from Tyee, Dan went on to play JUCO baseball at Tacoma Community College (TCC). In his freshman year at TCC, Dan was named 1st team All-Western Division infielder as a 3rd baseman. As a sophomore, Dan was named 2nd team All-Western Division Infielder and 1st team All-NWAACC tournament team as a 2nd baseman.

Dan graduated from the University of Washington in 2002 with a degree in Sociology. After graduating, he played in the NABA and PSSBL baseball leagues for over 10 years. He has had a lifelong passion for baseball and has been coaching youth teams ever since he hung up his spikes as a player. 

Pitching Coach

Mason McAlister

Mason graduated from Yukon High School, Oklahoma, in 2014. He went on to pitch for Cowley College, Kansas, won a conference championship and played in the D1 JUCO World Series. 

In 2016, Mason transferred to Oklahoma Christian University and received an All-Conference Honorable Mention. For two years, Mason coached college baseball in the PIL and WCL leagues with the Redmond Dudes. In addition, he posted a career 3.77 ERA in three professional seasons in Independent Leagues (partner of MLB Leagues) and has 3+ years of experience training athletes to be more efficient in their movements and patterns. 
 

Director of Coaching & Player Development, College Placement Advisor

Eddie Cribby

Coach Cribby brings Division I college coaching experience to Boost Baseball, having coached at Villanova University, Saint Peter’s University, and Fordham University. Most recently, he coached at Villanova University during the 2023–2024 season, working with the catchers, assisting with hitters, and coaching first base.

Prior to Villanova, Coach Cribby had coaching stops at Saint Peter’s University in New Jersey and Fordham University in New York, leading an infield group that placed Fordham #1 fielding percentage in Atlantic-10 Conference play. He also spent a summer in the Northwoods League as Bench Coach and Hitting Coach for the Rochester Honkers, working with several future MLB draft picks.

Coach Cribby is excited to be back in the training facility environment, working closely with high school players and the next generation of athletes. With its incredible Bellevue location, Boost Baseball is uniquely positioned to serve players from across the Eastside and greater Seattle area, providing a premier training environment focused on long-term development and preparing athletes for the next level.

Program Coordinator and On-Field

Operations Lead.

Garret DeGallier

With 10+ years in the college baseball landscape (2015 - 2025), Garrett has held multiple roles as an assistant coach across Concordia University, University of the Pacific, Seattle University, and served as Head Coach of a WCL collegiate summer team. Across his stops, he has coached outfield, infield, hitters, and baserunners, led recruiting efforts, run revenue generating camps, and directed player development and operations.

As a player (2011-2015), DeGallier competed at Tacoma Community College and the University of South Alabama, where he was part of a 2015 Sun Belt Conference Championship team.

Garrett specializes in motivating athletes through developing disciplined baseball and life skills—helping them better understand who they are and what they need to be great—while building high-performing players.

Pitching Coach

Shane Buchanan

Shane graduated from Auburn Mountainview High School in 2017. Earned 2nd team all SPSL junior year as a pitcher. Honorable mention 4a NSPL all league pitcher senior year. 

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Went on to play at Green River College in the NWAC in 2022. Won a gold glove. Played for the Redmond Dudes till moving to the Bend Elks for 2022-2023. Transferred to Mt Hood Community College in 2023. Posted a 1.26 era over 10 appearances. 

Two years experience training pitchers.  

Specializing in the Armcare program, crossover symmetry bands

Baseball Operations Specialist.

David Hammonds

Coach David Hammonds brings a unique combination of leadership, player development, organizational experience, teaching and a deep commitment to competitive youth baseball and his players. 

David has played an integral role in building and leading a competitive baseball organization in the Pacific Northwest as an Executive Director. He worked closely with coaches to create an intentional training environment that met the individual needs and skill levels of each team. 

David's approach to coaching is built around fundamentals, baseball IQ, accountability, confidence, and preparation. David believes that competitive baseball should be fun, challenge the players while providing them with the tools, instruction, and support necessary to succeed.

He is committed to helping athletes compete at a higher level, understand the game at a deeper level, and become the best version of themselves both on and off the field.  

David graduated from Mariner High School in Everett then continued contributing to the game at Shoreline Community College.

David's coaching experience includes T-Ball to 18u. Also serving on the coaching staffs at Stadium High School in Tacoma and Sumner High School in Sumner. 

Develop the player. Build the person. Compete with purpose. Love the game. 

Pitching Instructor

David Hammonds Jr 

Coach David Hammonds Jr has been immersed in baseball since he could throw a ball, developing a lifelong passion for the game through years of competitive playing, coaching, and officiating.

As a player, Jr competed at a high level from a young age, earning consecutive All-Star, All State selections and playing for several high-level club teams competing nationally. His primary positions were second base and pitcher, giving him valuable experience both on the mound and in the field. He was also a competitive contact hitter who hit for a high average.

His experience extends well beyond playing. Jr has coached multiple levels, including T-ball, youth and high school aged teams. He particularly enjoys the strategy and management of the game - understanding situations, and helping players understand not just how to execute, but why. 

Jr also spent a season as a youth baseball umpire. This experience provided him with a unique perspective that strengthened his understanding of rules, game situations, player decision-making, and the importance of sportsmanship & respect for the game. 

Jr believes great coaching is about developing players who can think about the game, make adjustments, and compete with confidence. He has a genuine passion for teaching and helping the next generation of players take their game to the next level.