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4/3/2014 2:12 A.M. ET

Cook almost ready to return to Major League action

OAKLAND -- Ryan Cook is "pretty close" to being deemed ready for big league action, manager Bob Melvin said Wednesday.

The right-handed reliever, slowed in spring by shoulder inflammation, will make a rehab appearance with Class A Advanced Stockton on Thursday, and that could be Cook's final outing before coming off the disabled list when eligible Saturday.

Outfielder Craig Gentry can be activated on the same day, but it's not yet known if that will happen. Gentry's wife, Jordan, gave birth to a girl on Tuesday night in the Bay Area, and the A's will have to decide whether he needs any more Minor League at-bats following his return.

"I think I'll leave that up to the training staff and whether we feel like this period creates a gap where we feel like he needs another game," said Melvin. "I'm not certain yet."

When Gentry does return, the A's will have to designate Sam Fuld for assignment. Cook's reinstatement will force them to option either Evan Scribner or Drew Pomeranz to Triple-A Sacramento.

Lindblom solid in spot start vs. Indians

OAKLAND -- Right-hander Josh Lindblom was brought up from Triple-A Sacramento to start the nightcap of Oakland's split doubleheader with the Indians on Wednesday.

Clubs participating in split doubleheaders are allowed to employ a 26th man on their active roster, so the A's did not have to take another player off their current roster to make room for Lindblom, who will return to the River Cats on Thursday.

The righty allowed two runs on five hits with two walks and two strikeouts over 4 2/3 innings in the spot start against Cleveland, keeping his club in the ballgame, despite Oakland's eventual 6-4 loss. He utilized 84 pitches in that span.

"I felt good," said Lindblom. "I wasn't very efficient at all, though. A lot of 1-0, 2-0 counts kinda hurt me, having to battle back from hitters' counts all night. It's tough to walk the tightrope with runners on base and make pitches. From that standpoint, I was able to do that, but to only go 4 2/3 is not ideal.

"You come in and you want to make an impression, and maybe you want to do too much, try to be too fine instead of attacking the hitters and going after them."

Acquired by the A's in the Craig Gentry trade that sent Michael Choice to the Rangers in the offseason, Lindblom went 0-2 with a 4.02 ERA in six games for the A's this spring, but took a no-hitter into the fifth in his final start against Seattle.

Lefty Scott Kazmir, originally scheduled to start Tuesday's postponed game, got the nod for the first game. Manager Bob Melvin said the decision for the second game came down to Lindblom and prospect Arnold Leon.

"A little more experience with Josh," said Melvin. "He's pretty similar to a guy like [Jesse] Chavez. He can give you the type of versatility, whether it's an inning or two or long relief or starting. His last outing was his best for us, started throwing a little bit of a slider, too, and now a four-pitch guy."

"It's great to have that trust and come in in a pinch like this, coming in and being able to try to help the team," said Lindblom.

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