Career
Petrick made his major league debut on June 27, 2007 for the Chicago Cubs, against the Colorado Rockies giving up two earned runs in two innings. On February 13, 2009, Petrick signed with the ThunderBolts for their 2009 season. Petrick appeared in 11 games on the season while recovering from an injury.
He went 1-0 with a 2.13 European Research Area in 12.2 innings, racking up three saves and 15 strikeouts while walking only three.
On April 21, 2010, the Joliet Jack Hammers acquired Petrick, from the ThunderBolts. Petrick"s brother, Zach, is also a professional baseball player.