Matt Kemp says collision didn’t cause his slump

SAN FRANCISCO — Matt Kemp insisted Friday that his recent slump wasn’t a result of an injury he sustained when he crashed into the center-field wall in Colorado on Aug. 28.

“I feel good, man,” he said.

But Kemp also said that if he was playing hurt, he wouldn’t publicly admit it.

Manager Don Mattingly was more revealing, saying Kemp’s left shoulder was still bothering him.

“I know he’s felt it a couple of times,” Mattingly said. “He got some stingers in his shoulders. Maybe that weighs on you a little bit, where if you know that you miss, you’re going to feel that thing a little bit.”

Entering Friday, Kemp had played six games since his crash at Coors Field. In those games, he hit .120 (three for 25) with one home run and one run batted in.

“He ran into that thing pretty good,” Mattingly said. “You’re not able to do that and not feel anything. I’m sure he’s felt some soreness in different areas. But, obviously, Matt doesn’t want out of the lineup. We don’t really want him out of the lineup. The only way we’d want him out of the lineup is if he knows he can’t really swing.”

But Kemp’s biggest problem is one the All-Star center fielder shares with some high-profile teammates, according to Mattingly: lack of selectivity.

“It’s a matter of swinging at strikes,” Mattingly said. “With a lot of our guys, especially with our guys in the middle, they’ve wanted to drive in runs. They know these games have been important. They’ve wanted to drive in that run. To me, you have to hit strikes. You are what you eat. If you don’t swing at strikes, you don’t hit.”

Guber checks in

Minority owner Peter Guber doesn’t think the Dodgers’ business goals will be compromised if the team fails to reach the postseason.

“I think the transformation of the ownership, not their aptitude but their attitude, is healthy enough to carry a couple seasons,” Guber said. “Everybody sees the direction is authentic. They see the direction of our team, our tongue, our heart and our wallet are going the same way. We may not win, but we certainly see the appropriate attempts.”

The famed film producer, who also owns a part of the Golden State Warriors, visited the Dodgers clubhouse.

Guber said he wasn’t disappointed that the team’s recent high-priced acquisitions haven’t immediately translated into wins.

“You can’t tell nine days later,” Guber said. “You look at it over time, certainly over a season, not over three weeks.”

Guber pointed out that the Dodgers didn’t make the moves they made for the sole purpose of making the playoffs.

“It’s not just that,” Guber said. “We did it because we had five other signals to send — signals to the fans, the sponsors, the media. You have to recognize it’s a business proposition.”

Short hops

Infielder-outfielder Alex Castellanos was called up from triple-A Albuquerque for the third time this season. Castellanos hit .136 (three for 22) in two previous major league stints. . . . Left-hander Scott Elbert, on the disabled list because of elbow inflammation, threw on flat ground.

dylan.hernandez@latimes.com