Via Andrew Baggarly of CSNBayArea.com:
SAN FRANCISCO – The Giants scratched Matt Cain barely an hour before he was to throw the first pitch Tuesday night after the right-hander cut a finger on his pitching hand.
Yusmeiro Petit will take the mound against the Padres instead. Cain accidentally sliced his finger on Tuesday afternoon when he mishandled a knife in the clubhouse kitchen at AT&T Park. The cut is not considered serious and didn’t require stitches, so the odds are good he hops back into San Francisco’s starting rotation at some point this week.
Cain has a 4.35 ERA, 1.32 WHIP, and 25/10 K/BB ratio in 31 innings this season.