PITTSBURGH -- Andrew McCutchen continued his torrid June by hitting a two-run home run and reaching base in all four plate appearances, leading the Pittsburgh Pirates to a 4-2 victory over the Chicago Cubs on Wednesday night.
McCutchen homered in the first inning to open the scoring. It was 10th of the season and sixth this month.
The center fielder also doubled and walked twice. In 10 games this month, he has 13 extra-base hits and 12 RBIs.
Shortstop Jordy Mercer had three hits for Pittsburgh, including a double, and left fielder Starling Marte added two hits.
Rookie right-hander Brandon Cumpton (2-2) won his second consecutive start, allowing two runs on five hits in five innings. He struck out five and walked two.
Closer Jason Grilli pitched a perfect ninth inning for his 10th save in 12 opportunities. Left-handers Justin Wilson and Tony Watson and right-hander Mark Melancon worked one scoreless inning apiece.
Cubs starter Jason Hammel (6-4) gave up four runs and 11 hits in five innings with two walks and six strikeouts. McCutchen's blast in the first ended the right-hander's streak of 14 consecutive scoreless innings and eight starts in a row without allowing a home run.
Third baseman Luis Valbuena had three hits of the Cubs' five hits.
The Cubs tied it with two runs in the top of the second -- on an RBI single by catcher John Baker and a groundout.
Pittsburgh went back on top 4-2 with single runs in the second and third innings. Mercer doubled and scored on a groundout and third baseman Pedro Alvarez tripled and scored on Marte's single.
NOTES: The start of the game was delayed one hour and 38 minutes because of a thunderstorm. ... The Pirates placed LHP Francisco Liriano on the 15-day disabled list with a strained right oblique, a day after he was injured in the fourth inning of his start against the Cubs. RHP Stolmy Pimentel was activated from the 15-day disabled list after being out since May 2 with right shoulder inflammation. ... Chicago 2B Emilio Bonifacio and LF Junior Lake were not in the starting lineup as manager Rich Renteria gave them a rest. Bonifacio entered as a defensive replacement. ... Pittsburgh RHP Gerrit Cole threw off flat ground from 90 feet before the game as he continues his rehab from right shoulder fatigue. Cole, who is on the disabled list retroactive to June 4, is scheduled to throw off a mound Friday. ... The four-game series concludes Thursday night with Cubs RHP Jeff Samardzija (2-5, 2.54 ERA) facing Pirates RHP Edinson Volquez (3-5, 4.27).