SAN FRANCISCO (AP) — Buster Posey hit a game-ending two-run homer for his third clout in two nights, sending the San Francisco Giants past the Colorado Rockies 4-2 on Wednesday night for Bruce Bochy’s 1,600th managerial victory.

Posey sent an 0-1 pitch from Juan Nicasio (5-6) just inside the left-field foul pole for his 18th homer of the year and second career walkoff homer. He also had one on May 3, 2013, against the Dodgers.

Santiago Casilla (2-3), who was ill Tuesday, plunked leadoff hitter Drew Stubbs in the back to start the ninth. Justin Morneau then doubled him home to tie the game at 2. Casilla got a key double play to get out of the inning.

Tim Hudson’s strong eight-inning, eight-strikeout outing was wasted.

Posey followed his two-home run performance a night earlier with a go-ahead single in the seventh inning, then an even bigger hit. He has hit safely in 12 of his past 13 games.