The Chase Dollander era began Sunday afternoon at Coors Field with the 23-year-old throwing 99 mph fastballs and the Rockies snapping a six-game losing streak with a 12-5 rout of the Athletics.

The moment didn't seem quite real even when 23-year-old right-hander Chase Dollander was told he was heading to Coors Field to make his major league debut with the Colorado Rockies. It seemed almost surreal when he informed his family and friends.

The Colorado Rockies announced on Friday that right-hander Chase Dollander, one of the sport's best pitching prospects, will make his big-league debut on Sunday against the Athletics. (First pitch is scheduled for 3:10 p.