Rockies placed RHP Blas Castaño on the 15-day injured list, retroactive to June 18, with a right pectoral strain.
Castaño is likely to be sidelined well into the second half of the season given the nature of the injury. The 27-year-old has posted an encouraging 3.92 ERA, 1.35 WHIP and 17/6 K/BB ratio across 20 2/3 innings in his Rockies debut this season.