CLEVELAND -- Indians reliever Rafael Perez could be sidelined for up to six weeks.
Cleveland placed Perez on the 15-day DL Friday because of a strained side muscle and recalled left-hander Nick Hagadone from Triple-A Columbus before the start of a three-game series against the Los Angeles Angels.
Team trainer Lonnie Soloff said Perez will not need surgery and should be sidelined "three to six weeks."
Manager Manny Acta said Perez complained of soreness Wednesday after pitching one scoreless inning against Kansas City.
"He was examined by our trainers and then went for tests," Acta said. "We had been concerned with his lack of velocity, but thought it was related to his lack of time in spring training."
Acta said the injury is not related to the shoulder soreness that sidelined Perez during training camp. Perez mentioned in March that he did not pitch winter ball for the first time in several years, due to his heavy workload for Cleveland last season.
The left-hander went 5-2 with a 3.00 ERA in 71 games last season -- the third time in four seasons Perez pitched in 70-plus games. He worked 258 times out of the bullpen over that span. This is his first stint on the DL since being called up in 2006.
In eight appearances this season, Perez is 1-0 with a 3.52 ERA. He's eligible to be activated May 11.
"He will be out one day to six weeks," Acta said, adding that the team's medical staff told him they do not think the injury should linger as long as a similar strain sidelined former Indians reliever Rafael Betancourt for a month in 2006.
This is Hagadone's second stint with Cleveland. He was with the Indians from April 17-22 and posted a 2.70 ERA in three outings. At Columbus, Hagadone hadn't allowed a run in 7 1-3 innings.
Acta said Hagadone will assume Perez's role as the second lefty out of the bullpen behind Tony Sipp.
Also, Indians outfielder Shin-Soo Choo was not in the lineup for a third straight game due to a strained left hamstring. Acta said Choo will participate in some exercises directed by trainer Lonnie Soloff and then be evaluated.