Thairo Estrada and Mike Yastrzemski hit back-to-back home runs in the third inning, and rookie right-hander Keaton Winn had another strong start to lead the San Francisco Giants to a 3-2 victory over the Pittsburgh Pirates on Sunday. Rookie shortstop Tyler Fitzgerald added three hits for the Giants, who took two of three from the Pirates and finished their longest homestand of the season 6-4.