OAKLAND -- Jarrod Parker lost for the first time since May 22 on Monday as the Los Angeles Angels walloped the A's 12-1 at O.co Coliseum.
The loss snapped Parker's nine-game winning streak and his 19-game unbeaten streak, the longest in franchise history since Lefty Grove strung together 21 straight starts without being defeated in 1931.
"It was a good run," Parker said. "All good things come to an end. I guess if you're going to do it, you might as well give it up and get it over with."
Despite the loss, the A's magic number to clinch the American League West dropped to seven as the Tampa Bay Rays knocked off the second-place Texas Rangers 6-2 on Monday. The A's hold a 6½-game lead over the Rangers.
Parker (11-7) ran into trouble right off the bat, walking the game's first batter J.B. Shuck, who scored on a two-out blooper to center from Josh Hamilton. The Angels jumped ahead 2-0 when the next batter, Mark Trumbo, drilled a one-hopper off the left-field wall, bringing in Hamilton.
"Early in the game I was all over the place," Parker said. "There was very little execution, not too many pitches down in the zone, even off-speed was up."
The Angels added to the lead with a run in the third inning after the A's botched a pair of routine double plays.
With one out and a runner on first, Hamilton hit a line drive straight at second baseman Alberto Callaspo, which should have led to an inning-ending double play. But instead of doubling Howie Kendrick off first, Callaspo allowed the ball to hit his glove and roll into center field. Kendrick advanced to third on the play and eventually scored when shortstop Andy Parrino dropped a hard ground ball, allowing Trumbo to reach first base safely after he retired Hamilton at second.
The Angels drove Parker out of the game in the fifth by scoring three runs off three singles, a double and a walk.
Parker, who was scratched from his Sunday start because of stomach illness, surrendered eight runs, seven earned, on eight hits and two walks over 4 1/3 innings of work.
When asked how much his illness may have impacted his start, Parker said: "I'm not going to put it on that or make an excuse, but, whatever."
The Angels scored four more runs off the bullpen, including Mike Trout's 24th home run, which hit the glass windows beyond the center-field fence.
"He hit it a long way," A's manager Bob Melvin said.
As Parker fluttered on the mound, the A's bats struggled to generate offense against Angels starter C.J. Wilson.
The bats produced only four hits in seven innings off Wilson (17-6), who joined Joe Saunders (2009) as the only Angels pitcher to win four games against the A's in a season. The A's finally got on the board in the sixth when Derek Norris singled in Josh Donaldson.
"We've seen [Wilson] be tough before," Melvin said. "He kept the ball down, kept it off the barrel of the bat, mixed his pitches well. He pitched in to righties, pitched away from righties, back-door slider. You could tell early on he had his good stuff going."