Hoffman will start Sunday's game against the Padres in place of Tyler Anderson (knee), Thomas Harding of MLB.com reports.
Anderson is bound for the 10-day DL with left knee inflammation, so Hoffman may be in line for multiple starts if he can impress Sunday. The 2014 first-round pick showed his potential by posting a 3.29 ERA over 13.2 innings for the Rockies earlier this season, numbers he will look to improve upon as he makes his ninth career big-league start. Hoffman lasted just 2.2 innings in an outing against San Diego last season, allowing seven runs (none earned) and six hits while throwing 84 pitches.