The move with Westbrook was because of a strained left abdominal muscle and is retroactive to Wednesday, when he was pulled from his start against Toronto after going just 1 1/3 innings. It's the first time he's been on the disabled list since 2001.
Carmona (2-1, 3.76 ERA) made his fifth start of the season Monday, when he took the mound against the Orioles. He shut the Orioles down last Sunday, holding them to one run and six hits in a career-best 8 1/3 innings -- but he was optioned back to Buffalo last Tuesday.
Mujica went 0-1 in 10 games with the Indians in 2006. He was 0-0 with a 2.84 ERA at Buffalo this season.
Davis has been on the Indians' roster -- in some form -- since 2002. He was working in long relief this season, but struggled since the start. He had an 0-0 record with a 4.76 ERA, having given up 13 hits and six runs in 11 1/3 innings. Davis was out of options, so the Indians designated him for assignment.
"He never really settled into being the pitcher he ultimately will be," manager Eric Wedge said. "I think at some point in time he'll get there. He was a pro about it."
More injury news: Pitcher Matt Miller, on the disabled list now, will make a rehab start Tuesday night for Buffalo. A strained right forearm has sidelined him this season, but the Indians are hoping he'll be back shortly. He had a bullpen throwing session Sunday at Jacobs Field. The likelihood of Miller coming back shortly was another problem in trying to keep Davis with the ballclub.
Infielder Andy Marte is scheduled to play six innings at Buffalo in his rehabilitation. But pitcher Brian Slocum will be shut down for 7-10 days with right elbow irritation.
End of streak: Trot Nixon went 5-for-5 Sunday and added a sixth straight hit when he singled off Steve Trachsel in the second inning Monday.
But the streak ended when Nixon flied out in the fourth inning.
The good catches: Outfielder Grady Sizemore saved Sunday's win over the Orioles with two tremendous catches, but he said he never saw the replays that were all over television Sunday and Monday.
In fact, Sizemore just shrugged when asked before Monday's game if those were two of the best catches he's ever made.
"It's hard to rate your catches," Sizemore said. "As long as it goes in the glove, you're happy."
The center fielder's great speed helped immensely, especially on the diving catch he made with the bases loaded.
"You just try to react and catch it," he said.
Tride tidbits: The series with the Orioles is the first part of a 10-game road trip that will take the Indians to Anaheim and Oakland. ... The Indians' games on Tuesday and Saturday are going to be heard on WMMS (100.7 FM) because the Cavaliers are still going in the second round of the NBA playoffs. ... Cleveland's 18-10 start is its best since 2001, when it began 20-9. ... The Indians are hitting .297 with runners in scoring position over the last 15 games. They went 7-for-15 with runners in scoring position in Sunday's 9-6 win.
And the question is: Which Indian now has the longest streak of consecutive games played since Joe Carter -- a streak that also happens to be the fifth-longest active mark in the Majors at this moment?
Down on the farm: Bubbie Buzachero got his first win, and Brian Sikorski earned save No. 1 in Buffalo's 5-3 victory over Pawtucket on Sunday in a Triple-A game. Buzachero came on and threw the eighth inning in relief while Buffalo broke a 3-3 tie with two runs in the bottom half. Keith Ginter went 2-for-3 in the win. ... Akron suffered a 5-1 loss to Altoona in Double-A Eastern League play on Sunday. ... Class A Kinston had a better time, as Ryan Edell moved to 2-1, throwing six shutout innings in an 8-0 win over Salem. John Drennen and Nathan Panther both homered.
And the answer is: Sizemore has that streak, now at 225 since he played in Monday's game with the Orioles. The last game he missed was on Aug. 25, 2005, against Tampa Bay. Baltimore's Miguel Tejada (1,113) leads the Majors in that department. Sizemore played all 162 games for the Indians last year.
Coming up: Left-hander Cliff Lee (0-0, 7.50 ERA) will make the start on Tuesday when the Indians travel to Los Angeles for the opener of their three-game series with the Angels at 10:05 p.m. ET. Lee came off the disabled list on May 1. Ervin Santana will go for the Angels.
Jeff Seidel is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.