Michael Charles Johnston
- Bats Left, Throws Left
- Height 6' 2", Weight 215 lb.
- School Garrett College
- High School Penn Wood High School
- Debut April 7, 2004
- Final Game June 24, 2005
- Born March 30, 1979 in Philadelphia, PA USA
Johnston joined Jim Eisenreich as the only players known to have made the major leagues in spite of dealing with Tourette's Syndrome.