Michihiro Ogasawara was hit by a pitch on his left leg (above the calf) during his second at bat in the 3rd inning of tonight's game. Ogasawara had to be helped off the field and was promptly removed from the game. After getting some treatment for the leg (icing), Ogasawara was seen leaving the stadium (partway through the game) using crutches.
Said Tatsunori Hara, "While we need to wait a little before we know what's wrong, I'm concerned it might not be minor."
UPDATE 5/14 @ 2:09pm - Ogasawara was taken off the active roster today. The Giants also announced that Ogasawara might require around 2 weeks for a full recovery (no damage was found in the bones).