Zachary Thomas Jackson, (born May 13, 1983 in Greensburg, Pennsylvania) is a pitcher in Major League Baseball. He plays for the Cleveland Indians.
Jackson was drafted first in the first-year player draft by the Toronto Blue Jays in 2004 after completing his Junior year at Texas A&M University. He pitched very well, jumping to Triple-A in his first year. At the end of the year, the Blue Jays traded him along with Dave Bush and Gabe Gross to the Brewers for Lyle Overbay and Ty Taubenheim in December 2005.
The Brewers started Jackson playing in Triple-A for the Nashville Sounds at the beginning of 2006. Jackson pitched well and had a 3.00 ERA for the first month and a half. The Brewers called Jackson up on June 2 to help with their current pitching problems. Jackson filled a major void left by the injured Tomo Ohka, replacing him in the starting lineup. He fared much better than expected and was sent back down to Triple-A to fine tune his game, where he spent the entire 2007 season.