Gray (forearm) threw a 20-pitch bullpen session Wednesday, Jane Lee of MLB.com reports.
Gray reported feeling great after the session and he's scheduled to follow up Wednesday's activity with a 30-pitch bullpen session Friday. If all goes well there, the 26-year-old could move on to simulated games early next week. Gray is still hoping to return this season, but it is still unclear if he'll advance far enough in his recovery to be able to do so.