SEATTLE — The A's aren't used to seeing anything go wrong when Grant Balfour's on the mound.
The A's closer hasn't blown a save in his last 36 chances, but he got his first loss in almost a year when he gave up a three-run homer to pinch-hitter Kendrys Morales in the 10th inning of a 6-3 defeat to the Seattle Mariners on Sunday.
Balfour (0-1) came on to start the 10th with the game tied, a situation he's not used to.
"I wasn't expecting the call, I guess," Balfour said. "I guess I'm waiting for us to score to go in and save the game. So I didn't have the right mind frame going in maybe."
After getting a leadoff groundout, Balfour struck out Mike Zunino, only to have him reach first on a wild pitch. Balfour then worked Michael Saunders to a full count before Saunders singled and Zunino advanced to third. Morales then hit the first pitch he saw deep to right-center to end the game.
"The first pitch to Morales and the next thing you know, it's three runs," Balfour said. "It's like you struck the guy out and you've got 3-2 — then base hit and it's one pitch, three runs. It happened pretty quick."
Oakland manager Bob Melvin said he was ready to use Balfour for two innings and wasn't going to wait for a different situation to bring out his closer once it went into the 10th.
"We had a couple guys who weren't available and he's our best pitcher," Melvin said. "We were going to go with our best guy going into the day off."
Raul Ibanez gave the Mariners the lead with a two-run homer in the first inning and added a solo shot in the third, his team-leading 17th, to give Seattle a 3-0 lead.
Oliver Perez (2-1) pitched two innings to earn the win.
Brandon Moss' solo home run off reliever Danny Farquhar in the eighth inning tied the game at 3-3.
Oakland starter Jarrod Parker kept his four-game winning streak alive with a no-decision, giving up three runs on five hits with one walk and six strikeouts in six innings.
NOTES: After the game, Oakland optioned right-hander Dan Straily to Triple-A Sacramento. The A's will skip his spot in the rotation with three days off in the next eight days. Straily is expected to be called back up when the A's will need a fifth starter again in July.
NEXT GAMEA's vs. Reds
WHEN: Tuesday, 7:05 p.m.
WHERE: O.Co Coliseum
TV: CSN California
RADIO: KGMZ (95.7 FM)