Gray (abdomen) has been officially placed on the 15-day disabled list.
Gray has seen progress in his recovery from an abdominal strain dating back to March 22, most recently tossing a 40-pitch bullpen session Thursday. The Rockies will deploy a four-man starting rotation to begin the season, but the 24-year-old figures to take the fifth spot, when healthy. The Denver Post's Nick Groke reports that long reliever Christian Bergman could fill in temporarily should Gray not be ready when a fifth starter is needed on April 14 or 16.