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LOS ANGELES -- It wasn't until Zack Cozart's teammates were able to see him walking around the clubhouse and talking coherently to reporters that they could start feeling good about their 8-2 victory over the Los Angeles Dodgers on Monday night.

Rookies Devin Mesoraco and Todd Frazier each drove in three runs, and the Cincinnati Reds kept their focus after Cozart sustained a concussion when he was hit in the helmet by Chad Billingsley.

"They gave him all the tests and said that Zack should be OK tomorrow," manager Dusty Baker said. "We took him out more for precautionary reasons. He was a little glossy-eyed, so we decided to get him out of there because he got hit pretty good.

"It reminded me of when Goose Gossage hit 'Penguin' (Ron Cey) in the (1981) World Series and I was on deck. That's how loud it was," he said.

Cozart singled his first two times up before being struck by Billingsley's first-pitch fastball in the fifth inning. The rookie shortstop held his head with both hands while lying on his stomach for several anxious moments before walking off under his own power.

"I think it just got away from him. I don't even really remember, to be honest," Cozart said. "I just remember hearing a pretty loud bang, then I had some ringing in my ears, and that's why I was on the ground holding my ears.

"I've been hit before a couple of years ago in the minor leagues, and it was worse then because it got me under the helmet. But this one was scary because it was so loud when it hit the helmet," Cozart added. "That's why we wear helmets. The doc just said to monitor it throughout the night. I think everything should be OK. I feel fine. I feel a lot better than I thought I was going to be."

Homer Bailey and the National League Central leaders sent the Dodgers to their 12th loss in 14 games. Cincinnati played without All-Star first baseman Joey Votto, who has inflammation in his left knee, and third baseman Scott Rolen, who was scratched after leaving Sunday's game at San Francisco because of back spasms. But Mesoraco and Frazier helped pick up the slack.

"We're a team. We've got 25 guys, and everyone is supposed to do their job and contribute," Mesoraco said. "It doesn't matter if you've played 15 years or one year. This is our job -- to go out there and help the team win. Me and Todd came up big tonight, but throughout the year, everyone on the 25-man roster is going to have their good games and help us win."

Bailey (6-6) allowed two runs and five hits in eight innings, striking out seven and walking one.

Billingsley (4-8) lost his fourth straight start, giving up three runs and six hits in six innings with eight strikeouts and no walks. The right-hander is 0-4 with a 4.70 ERA in his past eight outings at Dodger Stadium.

Billingsley took a 2-0 lead into the fifth and retired his first two batters before hitting Cozart.

Pitching coach Rick Honeycutt came out to settle down Billingsley after the scary incident, and he retired the slumping Drew Stubbs for the third out.

"We just thought it was a good time to take a moment, step back and absorb the whole thing and gather his thoughts so that he could keep pitching well," Honeycutt said. "He was throwing the ball extremely well to that point, but there was just a change of momentum there and, unfortunately, he didn't escape that sixth inning."

The first three Reds batters in the sixth got hits. Brandon Phillips doubled and scored Cincinnati's first run on Frazier's broken-bat single. With two outs, Mesoraco delivered a two-run double down the left-field line to put the Reds ahead 3-2.

"You want to be the guy up there with two outs, guys in scoring position," Mesoraco said. "I've always had a lot of success in those types of situations in the past. And it's always a big pickup for the team if you can get those guys in. It was definitely a good feeling."

Cincinnati tacked on two more in the eighth against Todd Coffey with Frazier's RBI triple and Mesoraco's run-scoring single.

Jerry Hairston Jr. sent a drive into the Dodgers' bullpen in left field in the first inning -- only the second home run by Los Angeles in its past 18 games.

Luis Cruz, whose contract was selected from Triple-A Albuquerque on Monday, made it 2-0 in the second with a sacrifice fly. Cruz started at shortstop and was 0-for-2 in his Dodgers debut after stints with Pittsburgh and Milwaukee. He signed with Los Angeles as a free agent in November.

Dodgers shortstop and leadoff hitter Dee Gordon, whose two throwing errors on back-to-back plays led to a pair of unearned runs in the Dodgers' 8-3 win over the New York Mets on Sunday night, was on the bench. He leads the majors with 28 stolen bases but is batting only .228.

Game notes

Dodgers CF Matt Kemp, who hasn't played since May 30 because of a recurring hamstring problem, will begin a minor league rehab assignment with Class A Rancho Cucamonga on Tuesday, hoping to return to the Dodgers' lineup July 13. He also is planning on competing in the All-Star home run derby. ... Reds RHP Mat Latos was picked Monday as the NL player of the week by virtue of his two complete-game victories over Milwaukee and San Francisco. ... Bailey has won his past four decisions on the road and lost his past three decisions at home. His next scheduled start is at San Diego on Saturday. ... LHP Ted Lilly, who has been sidelined since May 24 because of shoulder inflammation, was transferred to the 60-day disabled list to make room for Cruz on the 40-man roster. RHP Shawn Tolleson was optioned to Albuquerque. ... LHP Lenix Osuna, the 16-year-old son of former Dodgers reliever Antonio Osuna, was signed by the organization Monday in his native Mexico. ... Stubbs was 0-for-5 with three strikeouts and is hitless in his past 20 at-bats.