OAKLAND, Calif. -- The Oakland Athletics began the month of May in quite a funk. Now, they are right back on track thanks to solid starting pitching and timely hitting.
The defending World Series champion San Francisco Giants, meanwhile, are searching to find their top form as June nears.
"We're doing a lot of things right," Norris said. "We're keeping it simple."
Adam Rosales homered in the eighth for the A's to snap an 0-for-24 stretch since he connected against Kansas City on May 17.
The A's are on a roll in this interleague Bay Bridge Series between the two reigning West division winners as it shifts to San Francisco for two games starting Wednesday night.
"To be winning the fashion we are right now and really with guys struggling, it means everybody feels like they're part of it and contributing," manager Bob Melvin said.
Nate Freiman hit an RBI single, and Jed Lowrie and Seth Smith each drew bases-loaded walks as Oakland (30-23) won for the 10th time in 11 games to move seven games above .500 for the first time since April 19.
Hunter Pence homered in the ninth and hit an RBI single in the first to give Mike Kickham a lead before he took the mound for his major league debut.
Parker (3-6) quickly settled into a nice groove. He reached seven innings for the third straight start, earning his second victory over the past five starts after consecutive winless outings.
"His stuff's always been there. It's a matter of going out there and doing it," Melvin said.
The 24-year-old Kickham (0-1) worked a clean first inning on nine pitches, hitting 92 mph on his first pitch. He reached 94 several times, too.
But the A's made contact.
Norris connected in the second for his second home run. Yoenis Cespedes hit a one-out double in the third for the first 10-game hitting streak of his career. That sparked a mound visit by Giants pitching coach Dave Righetti with a runner also on third. Josh Donaldson was intentionally walked, then Lowrie drew a bases-loaded walk to make it 3-1.
"You can talk about big hits, but you can also talk about big walks," Melvin said.
Freiman followed with an RBI single to chase Kickham. He was tagged for four runs on four hits in 2 1/3 innings with three strikeouts and four walks as the Giants lost for the seventh time in their past eight road games.
"He showed good stuff early. I'm sure he was amped up and then he got behind hitters but I liked what he showed," manager Bruce Bochy said. "It's his first outing, and that's always one to put behind you."
Chad Gaudin, who was in the mix to make the start Tuesday night in place of the injured Ryan Vogelsong, wound up pitching three innings. Bochy has said Gaudin is too valuable in relief to use him for a spot start.
Kickham might be up for just one more considering the Giants have three upcoming off days and don't need a fifth starter until mid-June.
He sat at a clubhouse table before the game receiving guidance from Vogelsong, who is recovering from last week's surgery on his broken pitching hand.
"Obviously, I came into it expecting a little heightened emotions but I was able to do a better job than I thought I would (keeping them in check)," Kickham said. "After that first pitch, it was like any other game. But mistakes here are magnified. I don't get away with what I do in Triple-A."
Marco Scutaro singled in the first as designated hitter against his former club. He scored on Pence's single. After that, Parker retired the next nine Giants batters in order before Brandon Belt's fourth-inning double.
The Giants missed center fielder and leadoff man Angel Pagan at the top of the lineup. He underwent an MRI on his injured left hamstring that revealed bursitis. He hasn't played since hurting himself in Saturday's game before his inside-the-park home run to win it 6-5 in the 10th inning against Colorado.
Giants RHP Santiago Casilla underwent surgery to remove a cyst in his right leg. Bochy didn't have any details on the time table for his recovery. ... Bochy is considering giving his pitchers in a struggling rotation an extra day of rest with the off days. ... A's RF Josh Reddick was the designated hitter for Triple-A Sacramento in his rehab assignment from a sprained right wrist and will play there for a few more days. ... Oakland's pitchers are gearing up to bat when the series shifts to San Francisco for two games starting Wednesday night. ... Boston Marathon bombing survivor Aaron Hern, 12, threw out the ceremonial first pitch. He is from nearby Martinez. ... Norris hit his first career HR against the Giants last June 23. ... Kickham has been a roommate of manager Bochy's pitcher son, Brett, throughout the minor leagues. ... The A's faced a lefty starter for the fourth time in five games.