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 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.

Chase Dollander won his major league debut with five solid innings, and the Colorado Rockies beat the Athletics 12-5 on Sunday, snapping a six-game skid. Dollander (1-0), the ninth overall pick in 2023,