Marquez was called up from Triple-A Albuquerque on Tuesday, the Denver Post's Nick Kosmider reports.
Marquez is one of the Rockies' top pitching prospects, as he has the type of power arsenal that has a chance to play in Coors Field. That said, he may not make his first big league start until sometime next season, as the Rockies already have a six-man rotation set for the final month. Marquez posted a 3.13 ERA, 1.16 WHIP and 155:39 K:BB in 166.2 innings across Double-A and Triple-A this year, and is already 27.2 innings over his total from 2015. With that in mind, look for him to work out of the Rockies' bullpen down the stretch, where his stuff has a chance to really play up.