Jesse Carlson of Berlin signed a minor league deal with the Red Sox in December but has been released by Boston.
The 31-year-old left-hander hasn't appeared in the majors since 2010 as a member of the Blue Jays.
He was injured all of the 2011 season and tried to come back quickly this 2012 season.
He appeared in one game for Trenton in the AA Eastern League, allowing five hits and three runs, all earned in one inning on June 14 against Bowie.
Carlson was signed by the Boston Red Sox as a Minor League free agent on Dec. 7, 2011. He underwent surgery to repair a torn left rotator cuff and missed the entire 2011 season.
Carlson led the Toronto Blue Jays in appearances in 2008 and 2009 and was the Blue Jays Rookie of the Year in 2008. He made his Major League debut with the Blue Jays on April 10, 2008. He was selected by the Detroit Tigers in the 15th round of the 2002 First-Year Player Draft out of the University of Connecticut. His Berlin High School team won the 1999 Connecticut state championship.