The Royals lack a long man in the bullpen, and that could be Chen's role. He began this season as a starter but went on the disabled list on May 2 with a bulging disc in his back. He has since been successfully succeeded in the rotation by lefty Danny Duffy.
In his four starts for the Royals, Chen was 1-2 with a 7.45 ERA.
Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.