Chen began this season in the Royals' rotation, but he was sidetracked after four starts (1-2 record, 7.45 ERA) by a bulging disc in his back. Left-hander Danny Duffy took his spot in the rotation, and when Chen returned to the roster from the 60-day disabled list, he was primarily used as a long reliever.
Working his way back from a year off after Tommy John surgery in 2008, Chen joined the Royals in 2009. Chen finished his Kansas City career with a 47-43 record and a 4.53 ERA in 156 games (113 starts). He led the club in wins for three straight years, from 2010-12.
Jake Kring-Schreifels is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.