Brian Eric Reith (born February 28, 1978) is an American former professional baseball pitcher.

He was traded with Drew Henson, Jackson Melián, and Ed Yarnall for Denny Neagle and Mike Frank.

Reith made his Major League debut playing for the Cincinnati Reds in 2001.

In 2007, Reith played for the Somerset Patriots in the independent Atlantic League.

In December 2008, Reith signed a minor league contract with the Milwaukee Brewers, but was released before the 2009 season's start.