San Francisco ? Benito Santiago is the enforcer.

Pitch around Barry Bonds, and he makes you pay, shows up your strategy, hammers you into submission.

The ol’ catcher, stitched back together by doctors and as productive as ever, had three RBIs Thursday.

His 16 RBIs are the biggest reason for the Giants are one game from their first Series title since 1954, when they played at the Polo Grounds in New York.

Santiago’s first-inning sacrifice fly followed Bonds’ RBI double and gave the Giants a 2-0 lead. Then in the second, Bonds was intentionally walked for the sixth time in the Series, the 10th time overall. Santiago promptly hit a two-run single up the middle for a 5-0 lead.

Here’s the why Santiago’s hits have meant the most: He’s hitting .545 (6-for-11) in the postseason following intentional walks to Bonds with a walk, a home run and nine RBIs.