Rockies placed RHP Roy Oswalt on the 15-day disabled list with a left hamstring strain. Oswalt suffered the injury during the second inning of his start Sunday against the Diamondbacks. The Rockies have called up outfielder Charlie Blackmon to replace him on the active roster.

The Rockies are expected to place Roy Oswalt (hamstring) on the 15-day disabled list Monday. Oswalt suffered a strained left hamstring in the second inning of his start Sunday against the Diamondbacks. The veteran right-hander will likely miss three weeks.

Roy Oswalt was removed from Sunday's game with a strained left hamstring. The Rockies have yet to provide any further details about the injury, but a trip to the disabled list is very possible. Oswalt allowed one run on two hits over 1 2/3 innings before exiting.

Roy Oswalt left Sunday's game with an apparent calf injury The full extent of the injury isn't yet known, but the Rockies should provide an update on his status soon. Oswalt allowed one run on two hits over 1 2/3 innings before exiting.

Roy Oswalt gave up five runs on nine hits and a walk over six innings in Wednesday's loss to the Red Sox. Oswalt struck out five and for the most part pitched well after a rough first inning, but by then it was too late. The veteran righty has a 7.36 ERA and 1.73 WHIP in his first two starts for the Rockies, but he boasts a 16/1 K/BB ratio and his velocity has been fine. His start start will come at home against the Dodgers.

Roy Oswalt struck out 11 in his Rockies debut Thursday, but he took a loss after giving up four runs in five innings. Despite all of the strikeouts, the Nationals got to Oswalt for nine hits, one of them a solo homer. It was still a good sign that Oswalt was throwing strikes and missing bats. He'll have a tough assignment against the Red Sox in Fenway next time out.

Rockies purchased the contract of RHP Roy Oswalt from Double-A Tulsa. Oswalt will make his Rockies debut on Thursday night at Nationals Park. The veteran righty had a cool 2.16 ERA, 0.93 WHIP and 25/7 K/BB ratio in 33 1/3 innings at the Double-A level and is worth a look in mixed leagues.

Roy Oswalt is officially scheduled to make his Rockies debut Thursday in D.C. against the Nationals. Oswalt signed a minor league contract with Colorado on May 2 and has registered a stellar 2.16 ERA, 0.93 WHIP and 25/7 K/BB ratio across 33 1/3 innings since reporting to Double-A Tulsa. The veteran right-hander is worth a try in most standard mixed fantasy leagues, though keep in mind that he struggled last year with the Rangers.

Troy Renck of the Denver Post suspects that Roy Oswalt will start Thursday against the Nationals. Oswalt has registered a promising 2.16 ERA, 0.93 WHIP and 25/7 K/BB ratio in 33 1/3 innings at Double-A Tulsa since signing a minor league contract with the Rockies in early May. The veteran right-hander may be worth a try in deeper mixed fantasy formats. He had a 5.80 ERA and 1.53 WHIP in 59 innings last season for the Rangers.

Roy Oswalt allowed no runs on five hits over 8 1/3 innings in his start Friday with Double-A Tulsa. He threw 102 pitches, 60 strikes and had seven strikeouts. Oswalt now has a 2.16 ERA over four rehab starts. He remains on track to join the Rockies' rotation Wednesday against Toronto.