CINCINNATI -- Those two home runs aside, Joey Votto thought he had a pretty lousy day at the plate.
"It didn't feel like a great day with the bat for me but I end up with a couple homers and a couple walks. It's such an odd game sometimes," Votto said.
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Votto has hit longer home runs but few as effective.
"The first home run just scraped out of the ballpark and then the last one kind of the same thing but I didn't feel very good today."
Votto hit a full-count pitch from Collin Balester (1-3) into the left-field bleachers to push the Reds over .500 for the first time since July 3.
The second winning home run of his career sent the Nationals to a sixth consecutive loss, tying their season high.
"It's a shame there wasn't a runner in scoring position or we could have walked him," Nationals manager Davey Johnson said.
Johnny Cueto and five Reds relievers combined for 19 strikeouts, tying the team record. Cueto fanned 11 in seven innings.
Bill Bray (4-2) allowed one hit in the 14th to get the victory.
"We're always talking about picking each other up," Baker said. "The bullpen has picked us up a lot of times. We had a number of chances and they had a number of chances."
Baker, Johnson and Washington bench coach Pat Corrales all were ejected.
Cueto maintained his NL ERA lead despite allowing a season-high nine hits. He gave up two runs and finished the day with a 2.05 ERA -- up from the 2.03 figure he took into the game. Cueto hit two batters and walked one.
Washington pushed across a run with two outs in the first on Danny Espinosa's single.
Votto tied it in the first and Jay Bruce put the Reds ahead in the fourth with his 28th home run.
Zimmermann, making what is expected to be his final start of the season, allowed six hits and three runs with one walk and six strikeouts in 4 1/3 innings. He had made 25 starts and pitched 161 1/3 innings in his first full season since undergoing Tommy John surgery in August 2009.
Third baseman Ryan Zimmerman, 3 for 25 (.120) over his previous six games, didn't start for the Nationals, but he tied it in the eighth by driving in Espinosa from second base with a two-out, pinch-hit single off Aroldis Chapman.
Werth singled in the ninth inning to give the Nationals the lead, but Alonso tied it with his third home run since being called up from Triple-A Louisville on July 26. Storen has blown five of 39 save opportunities.
"I faced him last week and he came right at me," Alonso said. "I get a lot of work in the cage and I try to stay positive."
- Reds 3B Scott Rolen has started taking ground balls and live batting practice and hopes to leave soon on a rehab assignment. He underwent arthroscopic surgery on Aug. 3 to remove bone spurs and fragments from his left shoulder.
- After a day off Monday in Atlanta, the Nationals will open a three-game series against the Braves with RHP Livan Hernandez making his 36th career start against them, the most by any active pitcher. Milwaukee's Randy Wolf is next with 26 starts.
- Cincinnati RHP Homer Bailey will make his first career home start Monday against the Phillies after going 0-2 with a 7.00 ERA in four starts at Philadelphia.