PHILADELPHIA -- Jarred Cosart pitched six strong innings for his first victory of the season and the Miami Marlins benefited from some loose play by the Philadelphia Phillies to win 6-1 on Wednesday night, ending a five-game losing streak.

Cosart, who spent over two years in the Phillies' chain after he was drafted in the 38th round in 2008, allowed four hits and one run -- on Cody Asche's homer. He struck out four without walking a batter.

Cosart (1-1) retired 14 straight hitters between the second and sixth innings, but left fielder Ben Revere tripled with two outs in the sixth, at which point the game was tied 1-1. Cosart struck out second baseman Chase Utley to end the threat.

The Marlins then put runners at the corners with one out in the seventh, courtesy of infield singles by shortstop Adeiny Hechavarria and second baseman Dee Gordon, sandwiched around Hechavarria's steal. With an 0-2 count on third baseman Martin Prado, Phillies reliever Luis Garcia (1-1) balked, allowing Hechavarria to score the go-ahead run.

Miami added four unearned runs off reliever Ken Giles in the eighth, courtesy of two errors. Utley committed the first, dropping a throw by Asche, the third baseman, with two outs and two on. That loaded the bases for Gordon, who lofted a fly ball to deep center.

Rookie outfielder Odubel Herrera retreated with his back to the plate, spun and then dropped the ball, allowing all three runners to score and Gordon to advance to third. Prado followed with an RBI double off the fourth Phillies pitcher, Justin DeFratus.

Philadelphia starter Cole Hamels allowed only one unearned run over six innings. Hamels, who struck out five and walked three, remains 0-2 this season and is winless over his last six starts, dating back to a victory at San Diego last Sept. 17.

The Marlins broke on top with a run in the second when Hamels, covering first base on a bouncer to second baseman Utley, dropped the throw, allowing Marcell Ozuna to score.

Asche then tied it with a leadoff homer in the bottom of the second. It was his second of the year.

NOTES: Before the game, the Phillies placed RHP Sean O'Sullivan on the disabled list due to left knee tendinitis and recalled RHP Hector Neris from Triple-A Lehigh Valley. The team also announced that RHP Dustin McGowan (1-0, 2.57 ERA) will start in O'Sullivan's place Thursday afternoon against Miami. ... Marlins LF Christian Yelich missed his second consecutive start with lower-back tightness. He is day-to-day. ... The two-run triple by Philadelphia LF Ben Revere in the seventh inning Tuesday in the Phillies' 7-3 victory over Miami was his first hit in 15 at-bats this season with runners in scoring position. According to the Elias Sports Bureau, he had the most at-bats without a hit in those situations of anyone in the majors.