ARLINGTON -- Chris Carter was placed on Triple-A Sacramento's 15-day disabled list Saturday with a left thumb sprain, seemingly hindering his chances of being recalled again when Major League rosters expand to 40 on Wednesday.

Carter suffered the injury during the River Cats' home game against Fresno on Friday while diving for a ball in the outfield, A's assistant general manager David Forst confirmed. He also sprained his right ankle in the same game, but A's manager Bob Geren noted his ankle is more of a "day-to-day thing."

X-rays were negative, but Forst said there is no timetable for the return of Carter, Oakland's highly touted prospect who received his first taste of the big leagues this month but struggled, going 0-for-19 with nine strikeouts before being optioned to work on his swing.

Carter, who reached the 30-homer mark with Sacramento this week, appeared to be an easy choice for a September roster addition with the A's. He's hitting .258 with 31 home runs and 94 RBIs for the River Cats, but his injury will likely force his Oakland return to be delayed for a handful of weeks.

Anderson hopeful to make next start

ARLINGTON -- One day after hyperextending his right knee in the second inning of a 7-3 loss to Texas, A's lefty Brett Anderson delivered good news in the form of no swelling, and he still believes he'll be able to make his next start.

Anderson, who stepped in the mound hole created by Rangers hurler Tommy Hunter and subsequently fell on Friday, took Saturday off from all baseball activity and said his knee is a little stiff but not enough to keep him from throwing long toss Sunday.

That will represent Anderson's biggest test, so if all goes well, he'll go through his normal bullpen session Monday before taking the mound for his next start in New York.

"It's a little tender," Anderson said Saturday, "but nothing major. I'll rest today, and after playing catch tomorrow I should be good to go.

"I feel pretty good. Tomorrow is a big factor, but it should be fine."

That's what manager Bob Geren likes to hear, especially after witnessing a stretch of 18 consecutive quality starts by his pitchers before Anderson's two-inning, four-run stint Friday.

"We're very encouraged," Geren said. "Both the trainer and doctor said how he feels tomorrow will be a good indicator. But right now, it's a very positive sign that he'll be OK."

Thus, Geren went so far as to say he's "hopeful" Anderson will be ready for Wednesday's meeting with the Yankees.

Geren keeping Cust's hot bat in lineup

ARLINGTON -- Jack Cust received his third start in left field in as many days Saturday, signaling that manager Bob Geren is quite content with keeping the slugger's bat in the lineup.

"He's been swinging the bat well," Geren said before the club's second meeting of a three-game set with the Rangers. "I think he's been swinging the bat better lately, getting better contact."

That much is evident by Cust's numbers on the current road swing through Cleveland, Texas and New York. He entered Saturday's contest 5-for-12 (.417) on the trip -- a mark that looks mightily better than his .213 average over his past 26 games.

Also coming out of a slump, Geren noted, is Kurt Suzuki, who collected two hits Friday while snapping an 0-for-22 streak. His .142 mark in August is the lowest in the American League and third lowest in the Majors, but Geren sees his catcher -- placed in the designated hitter's slot Saturday -- turning things around.

"He actually hit the ball pretty good with no luck during that stretch," Geren said. "I know he was getting a little frustrated because nothing was falling for hits. He lined out [a] couple hard ones, but he's been feeling a lot better. Last night he hit four balls perfectly."

Suzuki's DH start gave Landon Powell a start behind the plate, marking just the eighth time in the A's past 35 games that he has appeared in a game.

Worth noting

Rajai Davis entered Saturday's game at Texas just one steal shy of becoming the fourth player in Oakland history with two 40-steal seasons. Rickey Henderson, Bert Campaneris and Billy North have accomplished the feat. ... Also making his way into the A's record books by way of stolen bases is Coco Crisp, who has been successful in each of his past 14 attempts, which is the longest such streak by an A's player since Henderson tallied 15 straight in 1998.