Ottavino (elbow) will throw 15 pitches off a mound Friday, Thomas Harding of MLB.com reports.
He will open the 2016 season on the 60-day DL after undergoing Tommy John surgery last May. So far, there have been no reported setbacks Ottavino's recovery, and the Rockies will hope that continues as he ramps up his throwing activity. Jake McGee, Jason Motte, and Chad Qualls were brought in this offseason to bolster the back-end of the Colorado bullpen.