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ARLINGTON, Texas -- The Texas Rangers took the cautious route with starting pitcher Matt Harrison, placing him on the 15-day disabled with an inflamed nerve in his lower back, retroactive to Saturday.
Right-hander Justin Grimm has been called up from Triple-A Round Rock to start the series opener at Seattle on Thursday night.
Harrison, 0-2 with an 8.44 ERA, has been experiencing lower-back soreness for more than two weeks. He's allowed five earned runs in each of his two starts against Houston and the Los Angeles Angels.
Harrison said he expects to be fully recovered when he is eligible to come off the DL. He said he's still able to play catch and do some other baseball activities.
"It's frustrating but it's early in the season," Harrison said. "I didn't really say much about it because we were hoping it would take care of itself and work out where I was able to throw again but it just didn't like we thought it would."
"I don't want to overcompensate anywhere else and have arm issues," Harrison said. "It's better to miss two starts than end up missing 15 or 20 because I made it worse."
Harrison, who will stay in Arlington and receive treatment during the Rangers' seven-game road trip that starts Thursday, had an epidural this weekend during a visit to spine specialist Dr. Drew Dossett.
Grimm made two starts for the Rangers last season. He posted a quality start in his debut with seven strikeouts and no walks. He also allowed six runs and was chased after one inning against Detroit last June.
Grimm has made one start this season for Round Rock, getting the win while allowing a run in 5 2/3 innings."I just expect him to come and keep us in a ball game, that's it," Rangers manger Ron Washington said. "He's a strike thrower and I think he understands how he's supposed to use those strikes. And if he come up here and does that, I think he'll be fine."
Yu Darvish, who has been bothered by a blister on the ring finger of his right hand, is scheduled to pitch Friday in the second game of the series against the Mariners.
Darvish (2-0, 1.98) said Wednesday that he felt fine and that all was good in his bullpen session.
"I was able to command my pitches and I was able to throw most of my pitches," Darvish said through his translator. "I think it went well."
Asked if he was going to have to make any adjustments, Darvish said he wouldn't.
"Everything is still good, still on schedule," Washington said of Darvish. "I looked at his hand, (the blister) is even smaller. It's amazing how skin heals. So just hope he doesn't have any issues with it."
Todd Wills is a regular contributor to ESPNDallas.com. Information from The Associated Press was used in this report.