Gray (abdomen) threw a 55-pitch live batting practice session Monday, MLB.com's Thomas Harding reports.
He's starting the year on the 15-day DL, with the likes of Christian Bergman ready to fill in if Gray isn't ready by the time the Rockies need a fifth starter April 14 or 16. Gray's status will continue to be updated as he progresses, but Monday's session represents an encouraging sign.