San Francisco Giants defeat St. Louis Cardinals, 4-2

SAN FRANCISCO - The offensively challenged Cardinals spent the previous nine games riding a razor's edge margin for error into first place.

They discovered Friday night at AT&T Park what happens when that edge dulls.

A pitching staff that has carried the club for much of this month while lowering its ERA to the best in baseball encountered a rumble strip in a 4-2 loss to the San Francisco Giants. Joel Piñeiro, who had not walked a hitter in his last four starts, both wa...