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7/24/2013 1:36 A.M. ET

Cespedes set for return to lineup in finale

HOUSTON -- The A's are finally prepared to welcome back their Home Run Derby champion to the starting lineup on Wednesday.

Yoenis Cespedes, previously sidelined because of soreness in his left wrist, came off the bench in Tuesday's 5-4 loss to the Astros. The outfielder is expected to start Wednesday's series finale, manager Bob Melvin said after the game.

Cespedes, who took batting practice for the first time in four days on Tuesday, went 1-for-2 with a double in the game.

"He feels good," Melvin said. "So he'll play tomorrow."

A's option Green to Triple-A after slow start

HOUSTON -- Rookie Grant Green's slow start in the big leagues has resulted in a trip back to the Minor Leagues.

Green was optioned to Triple-A Sacramento following Oakland's 5-4 loss on Tuesday. According to a baseball source, infielder Adam Rosales is expected to join the team in place of Green, meaning the A's will have to create a 40-man roster spot.

Rosales is hitting .211 with the River Cats, including .240 (6-for-25) in six games since being designated for assignment by the A's on July 8.

Green, called up that same day in place of Rosales to make his Major League debut, is 0-for-15 with six strikeouts through his first five games. The A's witnessed a similar slow starter in Chris Carter, who, before being traded to Houston, began his career in Oakland hitless through his first 33 at-bats, with 13 strikeouts.

"You create your own opportunities at the big league level, and you have to perform, but we still feel [Green] has the ability to perform," manager Bob Melvin said Tuesday afternoon. "The offensive ability is definitely there. He squared some balls up yesterday, had some better swings. After the first ball he hit hard, he just looked more confident going up there the second time. That's the way it is with younger players."

Offensive struggles aside, Green has also already committed three errors.

"We knew coming in that he's more of an offensive player than a defensive player, and I think that's just more from the fact he's moved around quite a bit, hasn't been in one position, certainly at second base, for a long period of time," Melvin said. "He'll grow into that and be more comfortable."

Worth noting

• Lefty Brett Anderson (right foot) came out of Monday's bullpen session without any issues, putting him on target to throw another one in Houston on Wednesday. He'll make roughly 50 pitches.

Should Anderson forge on without any setbacks, there's a good chance he would be sent on a rehab assignment within the next week or two and return to Oakland's rotation sometime in August.

• Several wives, girlfriends and family members of A's players and coaches are teaming up with Smile Train, an international nonprofit that provides free cleft surgery and care to children in developing countries, to raise enough money to fund one procedure per mile they complete on a treadmill at the Coliseum on Friday.

The treadmill will be stationed adjacent to the left-field BBQ terrace, and an in-game raffle and donation table will be set up behind Section 120. All proceeds will go to Smile Train.

Also, Grant Balfour will participate in an autograph session beginning at 6 p.m. PT prior to the game vs. the Angels. It will be limited to the first 100 fans, who will be asked to donate $40 for a limited edition, signed All-Star Game photo of Balfour.

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.