Pirates 6, Phillies 5: Pedro Alvarez belted a three-run homer and Russell Martin drove in a pair of runs as host Pittsburgh won for the 10th time in 11 games.

Andrew McCutchen went 3-for-3 with two walks and scored twice for the Pirates, who rebounded from Tuesday’s series-opening loss and own the best record in the majors at 52-31. Jeff Locke (8-1) won his eighth straight decision, allowing three runs (two earned) on seven hits and three walks over 5 2/3 innings.

Delmon Young singled in his first three at-bats, the second of which was his 1,000th career hit. John Lannan (1-3) struck out five through five innings, but surrendered four runs on a season-high 11 hits – including Alvarez’s tiebreaking homer in the fifth inning.

Lannan worked out of trouble in each of his first four innings, but lost the lead given to him on Ben Revere’s fourth-inning RBI single when three straight batters singled with one out in the fifth. Martin’s single scored McCutchen to tie the game and Alvarez cleared the bases two pitches later with his shot to right-center.

The Phillies rallied to 4-3 in the sixth on a RBI single by Kevin Frandsen and an unearned run on a fielding error, but the Pirates got those runs back on Martin’s run-scoring double and a wild pitch. Jason Grilli gave up a two-out, two-run homer to Domonic Brown in the ninth, but struck out Young for his league-leading 28th save.

GAME NOTEBOOK: McCutchen is batting .356 and has scored 33 runs in 42 games at PNC Park this season. Pittsburgh improved to 16-1 in the 17 games in which he has tallied at least two hits. … Philadelphia fell to 4-5 on its 10-game road trip, but Young went 3-for-5 to improve to 15-for-31 over that span. ... Locke’s winning streak is the longest by a Pirates’ left-hander since John Candelaria in 1983.