Krol has arm injuries in his history, having missed time in 2011 with a reported forearm injury. This appears to be more mundane, and not something that should cost him any time, though it could lead to a couple more days of rest.
Krol pitched through the shoulder issue Saturday to record four outs for his first Major League save. His velocity was a tick under his normal speed, but not alarming.
With two extra left-handers in the bullpen following the arrival of Blaine Hardy from Triple-A Toledo, the Tigers have options if manager Brad Ausmus wants to save Krol for a necessary situation. The options include Phil Coke, who found some recent success as a situational lefty before giving up three runs on three singles in the eighth inning Saturday.
Jason Beck is a reporter for MLB.com. Matt Slovin is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.