OAKLAND -- The A's got some bad news Friday, and it wasn't that they dropped a winnable 3-2 game to the Seattle Mariners, although that was bad enough.

The A's learned they will not have the services of opening day pitcher Brett Anderson until August at the earliest.

Anderson had a scan on his right ankle this week, the reading of which came in late Friday. Anderson, who has been wearing a walking boot and using crutches to get around on a stress fracture, had hoped the word would be that he was clear to take off the boot.

No such luck.

"The reading wasn't really what they wanted to see," manager Bob Melvin said. "He's going to have to stay with the boot a while longer, maybe up to another month."

The A's have been getting consistently strong starting pitching, including Friday when Tommy Milone allowed just two runs in 6 2/3 innings, so the need for Anderson isn't acute.

Still, the A's 12-game home winning streak ended.

As good as Milone was, he couldn't quite match Mariners left-hander Joe Saunders, who allowed one run in seven inning by keeping the A's off balance for most of the night. They got just five hits off him, including a pop fly double from Eric Sogard that drove in the only run off Saunders in the fifth.

That tied the score at 1-1, and there it remained until the seventh when Milone threw a changeup that Seattle rookie catcher Mike Zunino hit out of the park to center field.

"I didn't know much about him," the left-handed Milone said. "The only video we had was him facing a right-hander, four at-bats. I knew he was aggressive, though."

The reason the A's knew so little about Zunino was that he wasn't expected to be in Seattle this quickly. Drafted last year, he was in his first full year of pro ball when a series of catching issues in terms of production and injuries meant the Mariners had to go digging for help.

"That was the difference in the game," Melvin said of the homer.

Following an 18-inning win over the Yankees on Thursday, the A's didn't have much going offensively except for Chris Young. Moved into the leadoff spot with Coco Crisp on the bench (right foot) for the third consecutive game, Young was on base all four times he came up, with a single, a double, a homer and a walk.

It was a day of happy excess for Young, who had been 4 for 49 (.182) in his previous 14 games. Still, he said, you enjoy times like that more when you win.

The homer was a 419-foot monster to left field, but it came after the Mariners had pushed the lead to 3-1 by scoring a run off new Oakland reliever Dan Otero in the top of the eighth.

Oakland had a chance to score in the second inning when Nate Freiman doubled off Saunders and Derek Norris singled to center. Mariners center fielder Michael Saunders let the ball get past him slightly. Third-base coach Mike Gallego, who had been stopping Freiman, now urged him to go, but it was too late. Freiman wanted to take full blame.

"I've got to get a better read on that ball off the bat," he said.

  • Outfielder Billy McKinney, a first-round draft pick out of Plano West High in Texas, signed with the A's and took part in early batting practice Friday afternoon. He will report to the A's rookie facility in Phoenix on Saturday.

  • Third baseman Josh Donaldson missed a start for the second time this season after coming down with a cramp in his right hamstring Thursday. Donaldson said he is feeling better and hopes to start Saturday.

  • Yoenis Cespedes started for the first time since tweaking his left hamstring while running the bases in the first inning Tuesday. He went 0 for 4 as the designated hitter.

  • The A's called up the right-handed Otero while sending left-hander Hideki Okajima to Sacramento.

    The A's needed a long reliever with Jesse Chavez out of action for a few days after pitching 52/3 innings Thursday. Otero, who pitched 12 games for the Giants last season, is more likely to be able to give the A's a lengthy outing than is Okajima.

    saturday's game
    Seattle (Felix Hernandez 7-4) at A's (A.J. Griffin 5-5), 4:15 p.m. FOX