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04/10/2013 11:23 PM ET

Reddick swings pain-free, could play Thursday

ANAHEIM -- After taking 40 swings off a tee on Wednesday afternoon with no pain in his sprained wrist, A's right fielder Josh Reddick deemed himself available off the bench for that night's game against the Angels.

An eager Reddick maybe spoke too soon, with manager Bob Melvin saying that the outfielder could return as soon as Thursday, but the fact that he feels ready for game action again is encouraging.

Melvin said Reddick will go through full pregame activities, including batting practice on Thursday. Should all go well, he could be back in the starting lineup for Friday's home game against Detroit.

"No issues on the outer wrist, which was my concern," Reddick said. "A little sore where there's bruising, but that's going to happen, because it's bruised.

"What I saw on the video, I thought it was going to be a lot worse than what I went through. To be at this stage, just a few days after it happened, I'm quite happy. I don't think it'll be taking much longer."

Yes, Reddick has watched video of his Sunday crash into the wall at Minute Maid Park -- and more than once.

"After I saw it," he said, "I was shocked that nothing was broken or fractured. I should've let my face hit first. Maybe my beard would've cushioned it a little bit."

Sizemore tears knee ligament again, out for season

ANAHEIM -- To hear such horrific news once is terrible. Twice, simply unimaginable.

Oakland's Scott Sizemore is living that nightmare, learning Wednesday that after having missed all of 2012 while rehabbing his surgically repaired left knee, he has retorn the ACL and will be sidelined for the remainder of the season.

The A's infielder, 28, initially felt pain in the knee while chasing a fly ball in Tuesday night's game in Anaheim, which marked just his second start since September 2011, and he underwent an MRI administered by team orthopedist Will Workman in the Bay Area on Wednesday that revealed the tear.

Workman and the rest of the team's medical staff are discussing when Sizemore will undergo the surgery, which will be his third in the last five years. Aside from last year's procedure, the infielder also underwent surgery for a broken left ankle in 2009, shortly after the Tigers had handed him the monumental task of replacing Detroit fan favorite Placido Polanco.

Sizemore was traded from the Tigers to the A's in June 2011 and was immediately moved to third base, a position he took to with ease. He also was responsible for Bob Melvin's first win at the A's helm on June 10, 2011, when he provided the club's ninth-inning go-ahead run in Chicago.

Understandably, the two share a special bond, and Melvin was visibly shaken on Wednesday afternoon when relaying the news to reporters.

"Unbelievable," Melvin said. "It's just awful. I've been with Scotty since I took over here. We actually came up around the same time. He had a great year, played out of position, and he's one of those guys you really pull for, because he's such a good guy and cares so much and wants to win. He's coming off two difficult surgeries in the last several years, and to have a third one is devastating.

"We're thinking about him, but I can't imagine what's going through his mind right now."

With Sizemore out of the mix at second base, where he was platooning with Eric Sogard, the A's will continue to rely on Sogard, as well as switch-hitter Andy Parrino, who was recalled from Triple-A Sacramento on Wednesday to take Sizemore's place on the active roster.

The 27-year-old Parrino hit .368 with one home run and nine RBIs in 26 games with the A's this spring, but he struggled with Sacramento before his promotion, having batted .174 in six games with the River Cats, all at shortstop.

"Down there, things weren't really going our way, and you maybe try to press too much, do a little too much," Parrino said. "I think, me personally, that's what was happening, so I'm trying to get back on track and have a better approach at the plate."

Parrino is very much attractive to the A's because of his versatility. Outside of shortstop and second base, he can also play third and the outfield. In fact, his Major League debut -- in 2011 with the Padres -- came in right field.

"He's a good fit for us," Melvin said. "He had a good spring. He switch-hits and is very versatile. He's one of those guys that can really pick you up from any spot."

Added Parrino: "It's great to have the opportunity. It's a great honor and privilege, and hopefully I can jump right in there and help the team any way possible."

Melvin assured there was discussion regarding the possibility of bringing up Jemile Weeks from Triple-A to replace Sizemore -- "There was, absolutely," he said -- but the second baseman can really only play one position, unlike Parrino.

Perhaps not coincidentally, Weeks made himself available at shortstop on Wednesday and started there for the first time in his professional career.

"I wouldn't be surprised if that was Jemile's idea," Melvin said. "It just opens up some versatility options for him."

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