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6/22/2013 2:46 A.M. ET

Running fine, Cespedes returns to left field

SEATTLE -- A's trainers wanted to see Yoenis Cespedes run during pregame drills before giving him the green light to return to left field Friday night in Seattle. Turns out he passed the test.

So Cespedes, recently limited to designated hitter duties because of left hamstring soreness, made his first start in left field since June 11, moving Seth Smith to DH.

"They wanted to see him run around first," manager Bob Melvin said, "but he wants to play left field. He's tired of the DH thing."

Cespedes went just 4-for-28 with 10 strikeouts during his week-long stint at DH, bringing his season average down to .228, but he responded in Friday's opener, going 2-for-4 with a pair of two-run homers in Oakland's 6-3 win.

For Cespedes, it was not a coincidence.

"When I'm in the outfield ... my body's on fire," he said. "The difference is, when I'm a DH, I sit down in the dugout and I'm doing nothing and I feel like I'm going down a little bit emotionally."

Jaso a last-minute scratch from A's lineup

SEATTLE -- John Jaso was a late scratch from the A's lineup on Friday because of a left palm abrasion he suffered sliding Thursday in Texas.

With Jaso out, Derek Norris started at catcher, two days after taking a foul ball to his groin area, and went 0-for-3 with two strikeouts, lowering his season average to .189.

Jaso took part in batting practice Friday afternoon for all of one at-bat before heading for the trainers' room to have his hand wrapped. Still feeling game-ready, he took a few swings in the inside cages shortly before first pitch, then realized the pain was too great to play.

"He he was trying to loosen it up," manager Bob Melvin said, "and it was still pretty significant."

Jaso suffered the injury while sliding into second base during Thursday's afternoon game against the Rangers, using adrenaline to finish all nine innings.

He said Friday night his hand was still very sore and that he wasn't sure if he'd be back in the lineup Saturday, remarking, "We'll see how fast my body heals. I'm not Wolverine, but … "

Worth noting

• Monday's off-day will mark the first of three over an eight-day span for the A's, following a stretch of 30 games in 31 days. Melvin has not made any decisions on how he'll handle his pitching staff during that time, but said Friday he doesn't envision altering the rotation.

Jane Lee is a reporter for MLB.com. Read her blog, Major Lee-ague, and follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.