Flaherty (forearm) began a rehab assignment with Triple-A Toledo on Sunday, striking out two while yielding one hit and one walk over 1.1 scoreless innings.
Making his first appearance in seven weeks, Flaherty threw only 19 pitches in the outing, so he will likely make at least one more rehab start before rejoining the Tigers' rotation. The veteran right-hander has been sidelined since late July due to right forearm flexor inflammation.