Rockies transferred RHP Jhoulys Chacin from the 15-day disabled list to the 60-day disabled list.
An MRI revealed that Jhoulys Chacin has a strained right rotator cuff and fraying in the front of his labrum.
Rockies placed RHP Jhoulys Chacin on the 15-day disabled list with right shoulder inflammation.
Jhoulys Chacin admitted after Saturday's start to being concerned with his lack of arm strength so far this season.
Jhoulys Chacin fell to 1-7 after yielding seven earned runs in 5 2/3 innings Saturday to the Brewers.
Jhoulys Chacin dropped to 1-6 after giving up five runs in six innings Monday against the Cardinals.
Jhoulys Chacin yielded three runs and seven hits in six innings Tuesday in a loss to the Dodgers.
Jhoulys Chacin finally won for the first time this season by blanking the Braves for seven innings on Thursday.
Making his second start since coming off the DL, Jhoulys Chacin yielded two runs and four hits in six innings Friday in a no-decision against the Reds.
Jhoulys Chacin allowed four runs on eight hits over five innings in a loss to the Mets in his first start of the season on Sunday.
Rockies activated RHP Jhoulys Chacin from the 15-day disabled list.
Jhoulys Chacin (shoulder) will likely rejoin the Rockies rotation Sunday against the Mets.
Jhoulys Chacin (shoulder) allowed one run on four hits and four walks over six innings in Tuesday's rehab start for Triple-A Colorado Springs.
Rockies manager Walt Weiss said Saturday that it's "safe to say" Jhoulys Chacin (shoulder) will make one more rehab start.