The Colorado Rockies have placed 26-year old righty starting pitcher Tyler Chatwood on the 15-day disabled list due to an upper back injury. Chatwood has pitched in 22 games (all starts) for the Rockies so far this year and he is 10-8 with a 3.75 ERA and a 1.39 WHIP. He has given up 119 hits and 58 walks while whiffing 88 batters in his first 127 1/3 innings so far this year for the R0ckies. The Rockies have called up 28-year old righty reliever/starter Christian Bergman to replace Chatwood on the active roster. Bergman has pitched in 9 games (1 start) for the Rockies so far this year and he is 1-3 with a 5.89 ERA and a 1.58 WHIP. He has now pitched in 49 games (15 starts) in his first three years with the Rockies and he is 7-9 with a 5.35 ERA and a 1.49 WHIP. The Rockies hope that Chatwood only misses a couple of weeks, as he has been their best starting pitcher so far this year.