Justin Christopher Berg (born June 7, 1984) is a right-handed former professional baseball pitcher.

Berg played high school baseball in Wisconsin for the Antigo Red Robins.

[1] On August 27, 2005, the Yankees traded Berg to the Chicago Cubs for Matt Lawton, a reigning All-Star.

[4] He made his Major League debut on August 13, 2009, against the Philadelphia Phillies at Wrigley Field, pitching two scoreless innings in relief of Ryan Dempster.

[9] In September 2011, he underwent Tommy John surgery and was removed from the Cubs' 40-man roster but returned to their farm system during the 2012 season.