Michael Glen Dunn (born May 23, 1985) is an American former professional baseball pitcher.

He played in Major League Baseball (MLB) for the New York Yankees, Atlanta Braves, Florida / Miami Marlins, and Colorado Rockies.

Dunn spent the majority of the 2008 season in single A, playing for the Tampa Yankees, going 4–7 in 30 games.

[10] He made his major league debut on September 4, against the Toronto Blue Jays,[11] and pitched in three other games before the end of the year.

[13][14] On December 22, 2009, the New York Yankees traded Dunn, OF Melky Cabrera and pitching prospect Arodys Vizcaíno to re-acquire Javier Vázquez from the Braves with LHP Boone Logan.

[15] He started the season with the Gwinnett Braves in Triple-A, pitching to a 1.05 ERA with 56 strikeouts and seven saves in 42.2 innings before being called up on July 15 when left-handed reliever Eric O'Flaherty was placed on the disabled list.

[19] On November 16, 2010, Dunn was traded to the Florida Marlins with Omar Infante for Dan Uggla.

[23] After allowing six earned runs on eight hits and six walks, he was option to Triple-A New Orleans to make room for Dan Jennings on the active roster.

[30] In September, Dunn was recognized for his work with the media and local community when he received the Good Guy Award from the Baseball Writers Association of America.

[36] He had a strong start to the 2017 season, pitching to a 1.17 ERA in 7.2 innings before hitting the disabled list with back spasms on April 26.

By mid-August, Dunn was relegated to mop-up duty and was left off the Rockies' playoff roster.

[49][50] Since retiring, Dunn has gone on to serve as an assistant coach with the College of Southern Nevada baseball team.