Shinobu Fukuhara was taken off the active roster today because of tightness in his lower back. The Tigers expect Fukuhara to return to the active roster in the minimum ten days.
Source: Daily Sports 5/15/2013
Kosuke Fukudome (left knee) may not be able to return to the active roster until, at the earliest, June. His workouts on Tuesday included upper body and shoulder exercises and about twenty minutes of running in a therapy pool. Fukudome will not be able to begin regular roadwork training until the pain in his left knee goes away. Until then, he will have to continue pool therapy.
Randy Williams was taken off the active roster today with tightness in his left upper arm.
Source: Nikkan Sports 5/15/2013