Philadelphia averages 5.7 runs per game, the best in the league, but managed only Raul Ibanez's 14th homer in Harang's seven innings.
Jamie Moyer (3-4) remained winless in four May starts. Ryan Hanigan hit a solo homer, and Phillips and Jay Bruce had run-scoring singles off the left-hander. Leadoff hitter Willy Taveras had a pair of singles, ending an 0-for-19 slump that was the worst of his career.
Phillips broke the game open with a two-run triple in the seventh off Chad Durbin, his second triple in two games.
The Phillies opened their 10-game trip by sweeping a four-game series in Washington and winning their first in Cincinnati. They were batting .282 on the road, but couldn't do much against the Reds' top starter. Harang allowed four hits and a pair of walks while matching his season high with nine strikeouts.
Philadelphia didn't get a hit over the last five innings, with the last 10 batters going out in order.
The 46-year-old Moyer has played for seven teams, but hadn't pitched in Cincinnati since May 4, 1991, when the Reds were defending World Series champions playing at Riverfront Stadium. His first appearance at Great American Ball Park was better than his recent outings, but not good enough to bust his May slump.
Cincinnati scored a run in each of the first three innings off Moyer, who is 0-3 with a no-decision in May. He has given up 22 runs and 31 hits in 18 1-3 innings during the month. Hanigan's first homer of the season was the seventh off Moyer in May.
In his two previous starts, Moyer was rocked for 14 runs in only 6 2-3 innings, pushing his ERA to 8.15.
Notes: Ibanez's career high for homers was 33 with Seattle in 2006. He hit 23 last season. ... Moyer got Bruce and Taveras with moves to first base as they took off trying to steal. ... Reds RH Edinson Volquez felt stiffness in his back when he tried to throw in the bullpen, and recommended to manager Dusty Baker that he skip his next scheduled start. Volquez left a game on Saturday because of back spasms. ... 1B Joey Votto saw two more doctors Wednesday to try to find out why he's having dizzy spells. He has missed both games of the series.
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