ANAHEIM -- Baffled by a left-hander all night, the A's needed just one inning against Angels right-handed closer Ernesto Frieri to pull out a 3-2 win Monday.

John Jaso, who watched from the bench while Angels' starter Hector Santiago limited the A's to one run for seven innings, stepped in against Frieri and hammered a one-out, two-run homer into the right field bleachers in the ninth inning.

That turned a 2-1 deficit into a one-run lead, and Luke Gregerson came out of the bullpen to secure the victory, Oakland's third straight and ninth in 13 games. That's the best record in the American League.

But the bottom of the ninth had its own bit of drama as the Angels challenged a close play at first base. Eric Sogard bobbled a one-out grounder at second base, and his throw to first base was a dead heat. Umpire Chris Segal's original call was that Howie Kendrick was out, and the video review did not overturn it.

Jaso has always loved hitting in Angels Stadium. He came in with a .415 average here, and that number jumped to .424 (28 for 66) with the homer.

Oakland starter Jesse Chavez gave the A's seven good innings Monday night, but the Oakland offense wasn't up to the challenge posed by Santiago while Chavez was in the game. Chavez left having allowed just four base runners but trailing 2-1.

Santiago, just the second lefty to start against the A's this season, was touched for a solo homer by Yoenis Cespedes in the fourth inning but allowed only two other batters to get into scoring position.

Chavez allowed just four base runners, but that was enough to do him in as veteran slugger Albert Pujols delivered an RBI single in the first and a solo homer in the third.

Making his third start of the season, Chavez allowed just one more base runner after the homer, a single with one out in the fifth.

It was an impressive performance for the seven innings Chavez was in there. The first-inning run came on a single by Kole Calhoun, a passed ball off catcher Derek Norris and a single by Pujols.