The 2015 season saw the Colorado Rockies run 30 different pitchers to the mound. Some broke camp with the team, some came up because of injuries, some made highly touted debuts and some came up to replace those not performing. In this final category we find Ken Roberts, a lefty reliever called up at the beginning of May to replace Jorge Rondon, who himself had a poor performance in his one inning for the team.
Ken Roberts was drafted by the Rockies in the 25th round of the 2010 MLB Draft, and after five years in the minors, he finally made his big league debut on May 3, 2015 against the Padres.