Michael Thomas Campbell (born February 17, 1964) is an American former Major League Baseball pitcher.

Campbell was named Pacific Coast League Most Valuable Player in 1987 while coming up through the Mariners system with the Calgary Cannons before his MLB debut that same year.

During the 1989 season he was traded to the Montreal Expos along with Mark Langston in a 5 player deal in which the Mariners received Randy Johnson, Brian Holman and Gene Harris.

Campbell also played in the big leagues with the Texas Rangers, San Diego Padres and Chicago Cubs.

He played for the Yokohama BayStars in 1997 but had his season cut short by a serious ankle injury that required reconstructive surgery.