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06/23/12 9:54 PM ET

Anderson resumes mound work in rehab

OAKLAND -- Brett Anderson is back on track toward a return to the A's rotation, as the lefty threw off the mound for the first time Saturday since experiencing a minor setback just over a month ago.

Anderson, recovering from Tommy John surgery, threw 20 fastballs in the bullpen session.

"It was quick, it was efficient, the command was there," manager Bob Melvin said. "Once he felt a little something, we wanted to take a step back because he was on such a progression, but every time I've seen him throw, he's been terrific. It looks like a guy just throwing a bullpen. Good first start getting back on the mound again."

Anderson encountered forearm stiffness commonly associated with the Tommy John procedure in mid-May. He'll continue throwing bullpens, while upping his pitch count, and is hopeful to make a start in Oakland before season's end.

Cowgill goes on DL with sprained ankle

OAKLAND -- A day after Collin Cowgill was forced to leave Friday night's loss to San Francisco with a sprained left ankle, the A's placed the outfielder on the 15-day disabled list. Infielder Brandon Hicks was called up from Triple-A Sacramento to take Cowgill's place on the roster Saturday.

Cowgill, who's hitting .271 this season, reported he was diagnosed with a Grade 2 or 3 sprain. But he and A's manager Bob Melvin both said they expect him to return as soon as he's eligible to come off the DL on July 8, or perhaps shortly thereafter.

The outfielder injured his ankle when he unsuccessfully dove for Brandon Belt's fly ball to left field in the top of the ninth inning Friday. The play was the turning point in the game, as Belt's double scored two Giants runners and erased Oakland's 3-1 lead.

In bringing up Hicks, Oakland adds a versatile infielder. He's mostly played shortstop for Sacramento and was in the lineup at that position for Saturday's game against the Giants. But Hicks has also played second base and first base at times in his career, and Melvin said he'd be the team's primary backup at first behind Brandon Moss.

Hicks not only gives the A's their fourth Brandon on the roster -- "We were looking for another Brandon, and he was the last one left," Melvin joked -- but also brings some power to the A's, hitting .272 with 13 home runs for the River Cats. The 26-year-old has been hot recently, collecting 12 hits -- six of them homers -- over seven games before going hitless Friday. Hicks credited his success to simplifying his mechanics and keeping his head more still.

"I'm hoping to carry some of that over," Hicks said. "I got hot there on that last homestand. It was nice to hit some balls out of the park, and hopefully I can carry that over."

Originally acquired off waivers from Atlanta on March 13, the right-handed Hicks should see time mostly against left-handed pitchers. Switch-hitter Cliff Pennington, the A's regular shortstop, is batting just .160 from the right side of the plate. Hicks and Pennington both played for Texas A&M, with the former arriving two years after the latter left the Aggies.

Hicks has one hit over 26 Major League at-bats, having received time with the Braves the last two seasons.

A's move Colon to DL, bring back Ross

OAKLAND -- What was known days ago was made official Saturday, with Bartolo Colon hitting the disabled list and Tyson Ross not only taking his roster spot but his slot in the rotation for the day's contest against the Giants.

Colon, sidelined by a right oblique injury, pitched just two innings in his last start Sunday against San Diego before exiting. He played catch as recently as Thursday, and manager Bob Melvin said this week there is a possibility the veteran -- eligible to be reinstated July 3 -- could return before the All-Star break.

This marks Ross' third stint of the season with the A's, having last joined them just a week ago in Brandon McCarthy's stead for a start against the Padres, who collected just two runs on one hit in Ross' six innings on the mound.

Ross entered the day 2-6 with a 6.11 ERA in 10 starts with Oakland, where he's struggled with command, compared to a 2-1 ledger and 2.45 ERA in four starts in Sacramento.

Crisp tossed for arguing called third strike

OAKLAND -- A's center fielder Coco Crisp was ejected from Saturday's game against the Giants by home-plate umpire Tony Randazzo in the bottom of the sixth inning for arguing balls and strikes.

It was the first time Crisp had been ejected this season.

After drawing a full count, Crisp was called out on strikes on a ball that appeared to be thrown to the outside part of the plate by San Francisco's Madison Bumgarner. Thinking he had been walked, the 32-year-old initially made a move to first base.

He immediately began voicing his displeasure with the call to Randazzo and appeared to continue to argue as he walked toward the dugout. Crisp wasn't ejected until after the inning, leading A's manager Bob Melvin to come out to argue with Randazzo as well. Melvin, though, was not thrown out.

Right fielder Josh Reddick slid over to center to replace Crisp, and Seth Smith came off the bench to take Reddick's spot in right.

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