Mark Gronowski

Gronowski (undisclosed) has begun throwing again, Tyler Tachman of the Des Moines Register reports.

Gronowski (undisclosed) will begin throwing footballs lightly sometime over the next couple of weeks, David Eickholt of 247Sports reports.

Gronowski will undergo an offseason surgery and is expected to return to workouts in June, Sean Bock of 247Sports.com reports. "Mark played last season with a common football-related injury," Iowa head coach Kirk Ferentz said. "While he could have continued to play through the injury, Mark is choosing to have a procedure to address the issue, and we support him in his decision. Our sports medicine team thoroughly reviewed his records and has confidence he will be fully rehabbed in time to participate in our summer program. Mark will participate in all non-practice team activities while he recovers."