SAN FRANCISCO – Madison Bumgarner came out of his first rehab start Sunday in Arizona with no issues and was cleared to take the next step. He will start for Triple-A Sacramento on Friday, Giants manager Bruce Bochy said.

How was Bumgarner feeling?

“What part?” he said, scrambling up the clubhouse stairs.

Ummm… the arm?

“Feels like an arm.”

Isn’t that is Matt Cain’s line?

“So what? I like it.”

Bumgarner paused a moment. “But naw, I feel pretty good.”

Bochy said he didn’t have a complete schedule for Bumgarner’s rehab starts as he builds up strength in his bid to return to the rotation after the All-Star break. But there’s a good chance his next start after Friday would come July 5 at Single-A San Jose against Rancho Cucamonga instead of on the road at Albuquerque for Sacramento.

In the meantime, Bumgarner took batting practice on the field at AT&T Park Monday.

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Third baseman Eduardo Nuñez (hamstring) continues to do baseball work and is in line to be activated on Friday, Bochy said. The Giants likely will go down to a 12-man pitching staff at that time.

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Outfielder Austin Slater (hip flexor) was improved and an MRI ruled out structural damage. He might be available to pinch hit and could start by Wednesday.

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Matt Moore’s 6.04 ERA might be the highest among NL starters, but Bochy said he didn’t plan to skip the left-hander in the rotation.

“He’s better off pitching,” Bochy said. “It’s important to keep him going. I don’t think he wants to take longer than the five days to think about it or to take a step back. There’s no health issues involved. And I think he’s really close, I do. He tried to establish his fastball too much last time, and got burned because of it.”

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Lineups as the Giants begin a series with the Colorado Rockies, to whom they have lost 10 of 11 games this season: