Mark Anthony Thurmond (born September 12, 1956) is an American former professional baseball player who pitched in the Major Leagues from 1983 to 1990.

He was also the losing pitcher in Game 1 of the 1984 World Series against the Detroit Tigers, giving up only three runs, but only lasting 5 innings.

[3] Thurmond also started Game 5, and although he only lasted 1/3 of an inning, he gave up three runs again but earned a no-decision this time.

He made his final playoff appearance in Game 4 of the 1987 ALCS, pitching 1⁄3 of an inning without giving up a run.

Instead, he pitched in nine games for the Tucson Toros, the Astros' AAA affiliate, posting a 3.27 ERA with no decisions.