Michael Seth McClung (born February 7, 1981), nicknamed "Big Red", is an American former professional baseball pitcher.

McClung began the 2006 season with the Tampa Bay Devil Rays as a starting pitcher, was sent later that year to the minor leagues, and was converted to be a closer.

He started the 2007 season in Triple-A Durham of the International League, before being traded to the Milwaukee Brewers for Grant Balfour on July 27.

[1] He was then assigned to the Nashville Sounds of the Pacific Coast League before being called up to Milwaukee on August 21, making his debut with the Brewers in a relief appearance on the same day.

On February 1, 2010, McClung signed a minor league contract with the Florida Marlins with an invite to spring training.

Mac grew up going to games and spending time with his big league uncle, surrounding himself with high levels of success at a young age.