Mark Theobald:

DSA is owned and operated by Mark Theobald. Mark has been involved with baseball and softball as a player, high school coach, college coach, umpire and parent for the past 25 years.

Mark is has been certified as a hitting instructor by both:

Mike Epstein Hitting.

Mike played with the world champion Oakland A's in the early 70's. Mike was a protoge of Ted Williams and is the only hitting instructor ever endorsed by Ted Williams.

Dave Hudgens.

Dave was the hitting instrcutor for the Oakland A's and is currently the Director of Training for the Cleveland Indians. Dave's instruction is endorsed by numerous major league players, including Eric Chavez, Luis Gonzales, and Eric Brynes.