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6/18/2014 3:26 P.M. ET

Reddick opens rehab stint at Sacramento

A's want outfielder to get knee healthy, get swing back before returning

OAKLAND -- A's right fielder Josh Reddick, sidelined most of this month with a hyperextended right knee, is set to begin a rehab assignment with Triple-A Sacramento on Wednesday night.

Reddick will serve as the designated hitter for Sacramento's evening contest in Rock Round, Texas, before playing a game in right field for the River Cats.

"After four days, we'll see where he's at," said manager Bob Melvin. "We want him to come back swinging the bat well, and he knows that."

That means Reddick isn't assured of being on the club's charter flight to New York on Monday for the start of an eight-game, 10-day road swing.

He was hitting just .214 at the onset of his injury, and the A's are seemingly in no rush to force a roster move with Stephen Vogt playing so well. Vogt was recalled June 1, and entering Wednesday, he had hit safely in 10 of his 12 games, batting .359.

Mills to work out for A's, will likely start Saturday

OAKLAND -- Newly acquired lefty Brad Mills will join the A's for a workout at the Coliseum on Thursday, giving them 24 hours to decide whether to add him to their active roster.

The very chance of that happening seems likely, since manager Bob Melvin has strongly suggested it will be Mills making Saturday's start against the Red Sox in place of Drew Pomeranz, who was forced to the disabled list with a broken right hand after punching a wooden chair this week.

Nothing is official, though.

"I haven't decided anything yet," Melvin said Wednesday morning.

Triple-A right-handers Dan Straily and Arnold Leon are also under consideration, but Mills appears to have the edge.

The 29-year-old soft-tosser, acquired by the Brewers on Tuesday, went 4-2 with a 1.56 ERA in 14 appearances (12 starts) at Triple-A Nashville, including one stretch of 18 1/3 scoreless innings.

Worth noting

• Outfielder Coco Crisp, whose all-out style of play was on full display Tuesday when he crashed into the wall while attempting a catch, was held out of the lineup for Wednesday's series finale against the Rangers.

"He's a little beat up again," said Melvin. "He was progressing quite a bit with the neck, and I'm not sure that helped yesterday. I was considering giving him a day off anyway, and after that, definitely the right thing to do."

Craig Gentry made the start in center field in Crisp's stead.

Jane Lee is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.