Reddick and Davis hit two-run homers in the first inning to back seven scoreless innings from Kendall Graveman, and the A's snapped a three-game losing streak by beating the Colorado Rockies 7-1 on Monday night.
"That was really big," Graveman said. "It set the tone for the whole game."
Billy Butler also homered off David Hale (2-3) and scored three runs as power-starved Oakland matched its season high for homers. The power barrage helped the A's bounce back after getting swept in a three-game series by Kansas City to open a 10-game homestand.
"It was a good day for the team offensively," Davis said. "A couple of the guys that haven't really done much in the last couple weeks to help out, that's good."
Graveman (5-4) was the beneficiary of the big night from the bats, shutting down Nolan Arenado and the Rockies for his latest strong start since returning from the minors.
Arenado had one single but was unable to go deep after hitting eight home runs in his past seven games, including four in a weekend series across the bay in San Francisco.
Graveman was sent down to the minors after a rough opening month when he went 1-2 with an 8.27 ERA in his first four starts with Oakland. But he has been a completely different pitcher since being brought back up last month, using an effective sinker to become an effective part of the rotation.
Graveman allowed five hits and three walks with three strikeouts to improve to 4-2 with a 2.01 ERA in eight starts since coming back from the minors.
"He seems to have gone down there and figured it out pretty quick," Reddick said. "He's transitioned that pretty well up here."
Reddick got the A's started when he hit a no-doubt, line-drive homer into the right-field seats with two outs in the first. Carlos Gonzalez never flinched in right field as the ball sailed over his head.
Butler followed with a single before Davis launched a high drive into the right-field stands to make it 4-0 with his third homer of the season.
"They came out swinging," Hale said. "I guess I left a few over the plate or something."
Hale fell to 0-3 with a 7.54 ERA in his past four starts.
Rockies: 1B Justin Morneau continues to rehab a neck injury, with no timetable for his return.
Athletics: Switch-pitcher Pat Venditte (right shoulder) played catch with both arms before the game. ... RHP Taylor Thompson (shoulder) threw a 35-pitch bullpen session and is close to facing hitters.
Arenado extended his hitting streak to 16 games with his single in the sixth inning. Rockies teammate Troy Tulowitzki had three hits and a walk to extend his hitting streak to a career-high 13 games. Tulowitzki has also reached base safely in a career-best 28 consecutive games.
Oakland's Billy Burns had his 16-game hitting streak snapped.
Early in the game, a flock of seagulls started circling the stadium, making for some treacherous territory in the field. Reddick and Burns spent much of the time between pitches with their gloves on their head to protect themselves from bird droppings.
"Disturbing," Reddick said. "Just trying to do the best I could to protect my hat and my face from getting pooped on. It was kind of strange. I don't know what it was, but something was on the outfield grass. They seemed to enjoy it."
Rockies: Jorge De La Rosa (4-3) returns to the mound after leaving his most recent start early with a cut on his left middle finger. De La Rosa faces the A's for the first time since 2009.
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