Cobb (elbow) will make his first rehab start Wednesday for High-A Charlotte, Marc Topkin of the Tampa Bay Times reports.
Cobb reported no issues while facing hitters in recent days, so the Rays will advance him to the final step of the arduous rehab process from Tommy John surgery. Wednesday's start will mark the first of several for Cobb, who will need to build up his arm strength and pitch count after having not pitched since the 2014 season. His rehab stint could last up to a month, or longer if he suffers any setbacks along the way, making it likely that we won't see Cobb with the Rays until late July or early August at the soonest.