The A's are on a roll as they gear up for their second straight postseason appearance.
Oakland, which clinched the American League West title on Sunday, has won five games in a row and is one game behind Boston for the best record in the AL and home-field advantage throughout the playoffs.
The A's won the opener of a three-game series against the Angels on Monday, 10-5, to move a season-high 31 games over .500. They have won 10 of their last 12 games and 14 of their last 17.
Much of Oakland's success the past two seasons stems from its pitching staff. The rotation is performing well this month, as the starters have allowed two earned runs or fewer in the last 16 games.
A.J. Griffin, who will start for the A's on Tuesday night at Angel Stadium, has allowed one earned run in two of his last four outings and was charged with two earned runs his last time out. Griffin has won four straight decisions and needs a victory on Tuesday to reach 15 for the season.
"They've all pitched incredible baseball last year and they're carrying it over this year," Angels manager Mike Scioscia said. "They're getting a great mix on the offensive side with power. It's a great run. You have to tip your cap to them. They've certainly put together two seasons that are championship caliber."
The Angels, meanwhile, are fighting to end the season with a winning record. They need to win their final six games to finish above .500.
Despite Monday's loss, the Angels have been playing better of late and are 14-8 in September and 9-4 over their last 13 games. The Halos are 28-22 since Aug. 1.
"We definitely would rather play well than not well," said Jason Vargas, who will oppose Griffin on Tuesday. "The path that we had been on, the ups and downs we've had all year, it's nice to see a nice string of good quality baseball this last month."
Vargas has struggled this month, going 0-2 with an 8.41 ERA in four outings. In two starts against the A's this season, Vargas has allowed nine earned runs, three home runs and 17 hits in 11 2/3 innings. The left-hander has not won a start since Aug. 29.
Athletics: Home runs coming in bunches
Brandon Moss and Jed Lowrie each went deep on Monday as Oakland tied a franchise record with at least two homers in six consecutive games.
The A's have 84 homers in the second half, including 70 over their last 43 games. Oakland has four players with at least 22 homers and seven players with at least 12.
Moss leads the club with 28 homers. Lowrie has 15 homers, one shy of his career high.
• The A's lead the AL with 30 victories in one-run games. Oakland has won at least 30 one-run games in seven straight seasons.
Angels: Trout nearing milestones
Outfielder Mike Trout is one double and one triple shy of being the first player in Major League history with at least 10 triples, 20 homers, 30 steals and 40 doubles in one season.
He's also one double shy of becoming just the fifth player with at least 40 doubles, 30 steals and 100 walks in a season.
Trout has reached base safely 300 times this year and is just two shy of breaking Rickey Henderson's Major League record of 301 for a player who was 21 years old or younger at the start of a season.
• A's outfielder Coco Crisp is 14-for-39 (.359) lifetime against Vargas with two doubles, two homers and five RBIs.
• Angels third baseman Andrew Romine is 12-for-33 (.364) over his last 10 games.
Austin Laymance is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.