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8/31/2014 8:03 P.M. ET

Indians set to add three September callups

KANSAS CITY -- Indians manager Terry Francona announced the first round of September callups on Sunday.

Right-handed relievers Austin Adams and Bryan Price, and infielder Jesus Aguilar will officially join the team on Monday, when Cleveland can increase its 25-man roster to 40. Additionally, Jason Giambi will be activated from the 60-day disabled list.

Adams returns to Cleveland for the third time this season. He accumulated 3 1/3 innings during that span with a 10.80 ERA. Adams registered a 2.50 ERA in 54 innings with Triple-A Columbus this season

Price has seven years of Minor League experience, first with the Red Sox organization, then in Cleveland's farm system for the last six years. He had a 2.73 ERA in 20 innings at Columbus this season.

"It'll help, bullpen arms are always welcome," Francona said.

Aguilar spent two weeks with the Indians in May, batting .188 (3-for-16). He started six games at first base. Aguilar posted a .303/.394/.511 slash line in 495 plate appearances at Triple-A this season.

"When sometimes games get spread out one way or another, being able to get a guy off the field, not even just close-games wise, like maybe being able to pinch-run, because we've pretty much played with a three-man bench most of the year," Francona said.

Giambi makes his return to the Tribe, after left knee inflammation sidelined him on June 12. The 20-year veteran went 2-for-9 in three recent rehab games at Double-A Akron. Giambi was hitting .128/.212/.277 before hitting the disabled list.

McAllister recalled; Tomlin put on paternity list

KANSAS CITY -- The Indians recalled Zach McAllister from Triple-A Columbus and placed right-hander Josh Tomlin on the paternity list before Sunday's series finale against the Royals.

The move gives Cleveland a fresh arm in the bullpen, after it used seven relievers in a 3-2 extra-innings win Saturday, and six Friday in a 6-1 triumph.

"That's really welcome," said Indians manager Terry Francona. "It works out pretty well."

It's unlikely Tomlin would have been available Sunday anyway, as he was the final reliever in both games and threw 54 pitches Saturday.

"We knew Josh was on the cusp of leaving. … Josh was really good with us about communicating to us, probably since two weeks ago, that this was coming, and he stayed with us on it and everything, so we knew last night when he pitched that he was leaving," Francona said.

Francona indicated McAllister would be used in a relief capacity. It makes sense considering the taxed bullpen, and the lack of a spot in the rotation. But it will be a new role for the right-hander, who's pitched in 64 big league games since 2011, all starts.

This marks McAllister's fifth stint with Cleveland this season.

He battled injury early and was placed on the disabled list May 22 with a low back strain. The Indians recalled McAllister on July 12, setting off a string of back-and-forth trips between Columbus and Cleveland. His most recent stint with the Clippers lasted nearly a month.

McAllister owns a 5.91 ERA in 14 starts this season with the Tribe. He posted a 1.93 ERA in five August starts at Triple-A.

Smoke signals

•  Francona said he did not know if reliever Marc Rzepczynski would be available Sunday. The southpaw has pitched in five straight days, but with a light workload. Rzepczynski pitched to, and retired, one batter in each appearance.

Jackson Alexander is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.