Feltner (elbow) is expected to start Saturday's game against the Giants, MLB.com reports.
Feltner has been sidelined since April 24 but is ready to return after making two rehab appearances. He worked five innings in his last outing with Triple-A Albuquerque, so he should be able to handle a relatively normal workload. The Rockies will still need to activate Feltner before Saturday's contest to make the move official.