PITTSBURGH (AP) – Alex Wood pitched six innings while keeping his perfect record intact and Mike Yastrzemski hit a game-sealing home run as the San Francisco Giants beat the Pittsburgh Pirates 4-1. Wood improved to 5-0. He gave up one run while scattering eight hits. He struck out six and walked one as NL West-leading San Francisco gained a split of the four-game series. It has been a resurgent season for Wood, who went a combined 1-4 with a 5.96 ERA in 2019 and 2020 with the Cincinnati Reds and Los Angeles Dodgers while hampered by back problems.