Ginjiro Sumitani injured his left foot when he blocked the plate on a close play at home plate in the bottom of the 2nd inning of Sunday's game against the Rakuten Eagles. Sumitani remained in the game until the pain forced him out in the bottom of the 7th. The team trainer later told reporters the catcher likely suffered a contusion.
Incidentally, Kazuo Matsui was the runner and was called out for the final out of the inning.
Source: Sponichi 9/9/2012
Takero Okajima is the first rookie to record two walk-off hits (August 26 and September 8) in their first year since Takashi Kita in 2002 (May 1 and May 3). Okajima is also the first rookie to record a pinch-hit walk-off hit since Kojiro Machida on October 1, 1992. Source: Sponichi 9/9/2012