So Gray will reduce Friday's throwing session from 40 pitches to around 25 and play catch from between 90 and 100 feet, as opposed to 120 to 150 feet.
"In the throwing program, I'm going to take it easy, really focus on my delivery," Gray said. "As long as I get the fastball back in the zone, I think I'll be fine."
In 2014, Gray learned the hard way that less is more. He felt similar fatigue at the end of the season at Double-A Tulsa, where he went 10-5 with a 3.91 ERA in 24 starts.