Yoenis Céspedes made an error on a knuckling liner in the seventh inning Sunday, the drive to left-center by the Mariners' Corey Hart banging off the top of his glove.

The mistake didn't translate into a run, and the game remained scoreless - until Céspedes stepped to the plate the next inning and clobbered a two-run homer to left. The A's would pick up a 3-0 win over Seattle and a series victory.

"We've seen him do some funny things before and then come up big for us," manager Bob Melvin said of Céspedes.

As for Céspedes, asked about the error-followed-by-homer, he said, with Ariel Prieto interpreting, that he wanted "to try to fix the bad. ... I try but it is not always going to happen."

There was some concern when A's starter Scott Kazmir - who worked the first six innings - was seen in the dugout holding his left forearm and talking to a team trainer and Melvin. Kazmir was treated with extra care by the Indians last year after making only one big-league appearance in the previous two seasons.

Melvin said that Kazmir had triceps tightness, the same issue that caused him to skip one start during the spring, but it was not a big deal. Kazmir even lobbied to pitch the seventh.

"Everything is fine," Kazmir said in greeting reporters, then added later that he will make his next start. "It's very, very minor," he said. "It's really nothing."

Kazmir had a sensational outing, allowing two hits and striking out nine, but his velocity dipped after the triceps tightness hit; Kazmir said he was holding back a bit as a precaution. His fastball hit 96 mph during the game, and his changeup was particularly effective.

Melvin said that until Kazmir exited, "that might have been his best start of the season."