OAKLAND -- Pitcher Micah Owings, on a Minor League rehabilitation assignment with Triple-A Tucson, had a setback on Friday.

Owings, on the disabled list since April 26 with a strained right forearm, said that he felt soreness in his forearm while warming up to pitch in a game for Tucson.

"He was scratched from that outing," Padres manager Bud Black said.

The game Friday was to be Owings' first appearance in a game of any kind since April 25, the day before he landed on the 15-day disabled list. He was later transferred to the 60-day DL.

Owings was 0-2 with a 2.79 ERA in 9 2/3 innings for the Padres before he was hurt.

Earlier this month, Black said Owings would play some first base during his rehabilitation assignment. Before Friday, he had played one game at first base, gotten one start as the designated hitter and pinch-hit several times. He's 3-for-8 with a double.

Adding Quentin has boosted rest of lineup

OAKLAND -- There's no denying that Carlos Quentin has had a big impact on the Padres' offense since joining the team on May 28.

Before that, the Padres were averaging 3.08 runs per game with a slash line of .220/.298/.459. But since then -- and 16 games still qualifies as a small sample size -- the team is averaging 4.25 runs a game with a slash line of .258/.328/.444.

And while Quentin has been a boon for the offense, it's not just him. Manager Bud Black and those who play with Quentin agree that the lineup functions much better with him in it.

"Without a doubt," said Padres third baseman Chase Headley, who not so coincidentally had a 10-game hitting streak after Quentin returned. "I think that he gives everyone a little better chance to succeed. It's nice to have that big bat in the middle of the lineup."

Since Quentin returned, Headley has a .333/.435/.508 slash line.

"In just in the small time I've hit in front of him, I can tell I have been pitched a little different than I was before. It's nice to have him in there. I think it sets the rest of the lineup a little better to where it should be," Headley said.

This point hasn't been lost on Black.

"When you're pitching and you know a certain guy [Quentin] is on deck, the guys in front of him should get more strikes," Black said. "And you don't want Carlos coming up with guys on base."

Since missing the first 49 games after having knee surgery in March, Quentin is hitting .413 and has 10 extra-base hits with a .526 on-base percentage.

"Carlos was a guy that we were excited to get, a guy we planned on being in the middle of the lineup the majority of the time," Headley said. "I think this is more what they envisioned than before [the knee injury in March]. Hopefully he can keep it going."

Padres use 12th starting pitcher of season

OAKLAND -- Ross Ohlendorf became the 12th starting pitcher the Padres have used this season when he got the start Saturday against the A's.

Injuries and ineffectiveness caused the Padres to dip into reserve and even go outside the organization to find capable relievers to make starts.

Take Ohlendorf, who opted out of his Minor League deal with the Red Sox on June 1 to sign a big league deal with the Padres. That's not all.

The Padres have also used four other pitchers who weren't on the 40-man roster at the beginning of the season -- Joe Wieland, Jeff Suppan, Eric Stults and Jason Marquis.

In case you're wondering, the Padres used eight starting pitchers in 2010 and 2011. However, in 2009, the team used 15 starting pitchers.

The breakdown of starting pitchers this season and the number of starts they've made: Edinson Volquez (14), Anthony Bass (13), Clayton Richard (13), Suppan (6), Cory Luebke (5), Wieland (5), Stults (4), Marquis (2), Andrew Cashner (1), Dustin Moseley (1) and Tim Stauffer (1).

Short hop

Infielder Logan Forsythe (sore left abdomen) said Saturday that he was feeling better. Forsythe was a late scratch Thursday in Seattle and didn't play Friday against the A's. The Padres likely will give him a few more days of rest but it doesn't appear he'll need time on the disabled list.

"He feels better," said Padres manager Bud Black. "That's a quote from him."