Mark J. Johnson (born May 2, 1975) is former Major League Baseball pitcher. Johnson played for the Detroit Tigers in 2000. He is currently the pitching coach for the West Michigan Whitecaps.

Johnson was drafted by the Astros in the first round (19th overall) of the 1996 MLB draft. After the 1997 season, he was traded to the Florida Marlins traded Johnson, Manuel Barrios and Oscar Henriquez for Moisés Alou. In February 1999, the Marlins traded Johnson with Ed Yarnall and Todd Noel to the New York Yankees for Mike Lowell.

After the 1999 season, the Detroit Tigers chose Johnson in the Rule 5 draft. They released him in June.