Feltner (head) is set to begin a rehab assignment with High-A Spokane on Wednesday, Kelsey Wingert-Linch of AT&T SportsNet Rocky Mountain reports.
Feltner has taken a while to recover and resume a throwing progression after being struck on the head by a line drive in mid-May, but he's on the verge of appearing in a game for the first time in more than three months. Barring any setbacks, Feltner should be ready to return from the 60-day injured list before the campaign comes to a close.