Katsuya Kakunaka and Tadahito Iguchi left Friday night's game against Rakuten early due to injuries.
Kakunaka hurt his left leg while running out a grounder to second in the 1st inning. He was taken to the hospital and diagnosed with inflammation in his left biceps femoris muscle. Whether or not he comes off the active roster will depend on how he is feeling over the next couple of days.
Iguchi fouled a ball off his left calf during his at bat in the 3rd inning. He went on to hit a single to left and remained in the game until he was removed on defense in the 4th. He did not go to the hospital and instead received ice treatment.
Source: Sponichi 5/10/2013
Seth Greisinger will likely return to the active roster in time for a start against Yomiuri at Tokyo Dome on the 15th.
Source: Sanspo 5/10/2013