Manabu Mima left today’s game against the Seibu Lions at Kobo Park Miyagi in the middle of warm-ups before the start of the seventh inning. He told reporters after the game he was fine and that he developed a cramp in his leg.
[UPDATE 7/9 @ 3:35pm]
The cramp was in his right leg.
Source: Sponichi 7/9/2017