The Rockies are about to unveil right-handed pitcher Jeff Hoffman, the No. 3 prospect in their system according to MLBPipeline.com, at the Major League level. Hoffman, 23, the most celebrated piece in the deal that sent star shortstop Troy Tulowitzki to the Blue Jays just before the non-waiver Trade Deadline in 2015, is expected to make his Major League debut in a start Saturday night against the Cubs at Coors Field. An announcement is expected later Friday.