Gray (abdomen) has thrown three days in a row, but will start the season on the disabled list, Nick Groke of the Denver Post reports.
Gray has thrown 120 balls on flat ground the past two days, but won't throw off a mound until the end of the week. If the right-hander gets to throw off a mound by the end of this week, he'll either stay back in Arizona for extended spring training, pitch simulated games in Colorado, or head to Triple-A Albuquerque for a rehab assignment. While he's out, the Rockies will either go with a four-man rotation or use spot starters like right-hander Christian Bergman in his place