CLEVELAND -- The A's on Monday fielded a 24-man roster after sending out right-hander Graham Godfrey, who was optioned to Triple-A Sacramento before the start of the club's series at Progressive Field.

There was no corresponding move, but right-handed reliever Neil Wagner, acquired via trade from the Indians last year for cash, is expected to be selected from Triple-A on Tuesday and join Oakland's bullpen to fill out the active roster. Wagner has not yet appeared in a Major League game.

The club has to wait a day to make the transaction because lefty Jerry Blevins -- designated for assignment on Saturday -- needs to clear waiver options before a spot on the 40-man opens. Though that will happen Tuesday, it doesn't mean Blevins will be taken off the roster. The A's could choose to transfer Daric Barton (right shoulder) to the 60-day disabled list.

Wagner, who has quietly posted impressive numbers with Sacramento since his promotion from Double-A on June 25, would be the 14th relief arm used by the A's this year. He is 2-1 with a 3.10 ERA in 22 appearances for the River Cats and has compiled 34 strikeouts in 29 innings.

Godfrey's move was expected, as he was recalled following the first game of Saturday's doubleheader in Boston to start the second contest. He took the loss, allowing three runs on six hits in four innings before an hour-long rain delay ended his night.

Overall, the righty is 1-2 with a 4.71 ERA in four starts with the A's this year.

"It's about getting the opportunity and consistent chance at the big league level," manager Bob Melvin said. "He definitely has the stuff to be able to do it. It's just refining it and maintaining consistency with it."

Wuertz could return to A's this week

CLEVELAND -- It's unclear what type of additions the A's will make come Sept. 1, when rosters officially expand, but the club could be getting back a familiar face around the same time.

Michael Wuertz (thumb) tossed a scoreless inning for Class A Stockton on Sunday, allowing a leadoff hit before retiring the side on strikeouts. He could potentially need only one more rehab appearance before returning to the club. Wuertz has been stationed on the 15-day disabled list since July 30.

"His velocity was up to 93, and he felt really good from the comments I read on the report," manager Bob Melvin said. "I can see him making at least one more start."

The A's have used a handful of other arms in the seventh inning in Wuertz's absence, most notably Fautino De Los Santos, who has a 4.82 ERA over his last 11 games in increasingly significant roles after posting a 2.35 mark in his first 12 contests.

Worth noting

• The A's on Monday showed up at Progressive Field revitalized, following a rough stretch that saw them play four games between Thursday and Saturday that spanned a combined 14 hours and 19 minutes, for an average of 3 hours and 35 minutes per contest.

Saturday's doubleheader in Boston proved torturous, as it featured rain delays totaling 5 hours and 29 minutes. The A's arrived at Fenway Park shortly after 9 a.m. ET that day and didn't leave until nearly midnight.

"We were there more than 12 hours, and going through the delays and so forth, which can be taxing. Then on top of it, at least from the players' standpoint, you have to deal with the conditions and deal with coming on and off the field, which is a mental grind," manager Bob Melvin said. "All of that kind of wears on you to an extent, so it was good we had a day off."

• Lefty Josh Outman, who used 77 pitches through four innings of relief in the nightcap of Saturday's twin bill in Boston, will remain in the bullpen but will be rested for at least two more days, following his seven-strikeout performance.

"He's a guy coming off an injury, so we have to be careful with him," Melvin said. "The organization has him as a starter down the road, but in the interim, he could be a nice piece to have in the bullpen."