MIAMI (AP) Colorado Rockies right-hander Tyler Chatwood is back on the disabled list.
Chatwood went on the 15-day DL Sunday with a mid-back strain, and the team hopes he'll rejoin the rotation as soon as he's eligible.
''I don't think it will be much longer than that,'' manager Walt Weiss said. ''It's hard to tell. We're thinking at this point that the 15 days will be sufficient.''
Right-hander Scott Oberg was recalled from Triple-A Albuquerque before the Rockies' game Sunday at Miami to take Chatwood's roster spot.
Right-hander Eddie Butler, who is 2-4 with a 6.26 ERA and has made seven starts this year, is likely to take Chatwood's place in the rotation.
Chatwood (8-4, 2.89 ERA) left Saturday's start at Miami after 1 2/3 innings because of the injury. He has made 14 starts this season after returning from his second Tommy John surgery.
Back trouble is apparently something new for the right-hander.
''I think this is the first time he has dealt with this type of injury,'' Weiss said. ''He hadn't mentioned ever experiencing anything like this.''
Oberg had a 4.76 ERA in eight games with Colorado before being optioned to Triple-A on May 20.