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 Colorado Rockies rookie makes a strong statement in his first MLB start The Colorado Rockies made the call to the minor leagues and pulled up Chase Dollande

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.