Justin Grimm was acquired in 2013 as part of the Matt Garza trade and the same deal that saw Carl Edwards get shipped to the North Side. After making the transition from the rotation to the bullpen following the 2013 season, Grimm thrived as a latter-inning reliever for the Chicago Cubs.
From 2014 to 2015, Grimm appeared in 135 games and recorded an excellent 3.03 ERA over 118 2/3 innings pitched. In that same span, Grimm allowed just eight home runs and struck out 10.4 batters per nine innings.
Coming off a dominant 2015 season in which he posted a 1.