Hoping that their ace will miss just two starts, the Texas Rangers placed right-hander Yu Darvish on the 15-day disabled list Wednesday due to right elbow inflammation.

The move was made retroactive to Sunday, the day after Darvish's most recent start. Darvish will undergo an MRI exam Thursday.

General manager Jon Daniels said that Darvish is dealing with pronator tendinitis.

"The (ulnar collateral ligament) was our first question, but Dr. (Keith) Meister didn't feel that was involved," Daniels told the media, referring to the team physician. "Yu said, if we were maybe in a different spot playing a meaningful game, he might be able to pitch. But we all agreed that with the year we've had with injuries, we're not going to push anything."

Darvish reportedly felt elbow discomfort while playing catch Monday, and he abandoned plans for a bullpen session Tuesday. He wasn't troubled by his arm during a four-inning outing Sunday during a loss to the Houston Astros.

Darvish, 27, is 10-7 with a 3.06 ERA in 22 starts this year.

To replace Darvish on the roster, the Rangers called up left-handed Alex Claudio from Triple-A Round Rock, and he will pitch out of the bullpen. While appearing for three teams in the Texas farm system this year, Claudio went 6-3 with five saves and a 1.66 ERA in 27 games (nine starts). The 22-year-old has no major league experience.

Left-hander Robbie Ross will be called up from Round Rock on Thursday to start against the Tampa Bay Rays. Ross went 2-4 with a 5.61 ERA in 18 games (nine starts) for Texas earlier this season.