Michael Bruce Warren (born March 26, 1961) is an American former Major League Baseball pitcher for the Oakland Athletics.

Though he made just 27 starts in his career, he pitched a no-hitter at Oakland–Alameda County Coliseum against the Chicago White Sox on September 29, 1983.

Warren rewarded the A's with a breakout season for the Modesto A's in 1982, going 19-4 with a 3.00 ERA and 154 strikeouts to lead his team to the California League Championship.

He went 6-3 with a 3.53 ERA for the Tacoma Tigers to earn a call back to Oakland that August, this time as a starting pitcher.

He was shipped to Tacoma to make room on the major league roster when the A's signed Tommy John.