Browns' Nick Mullens to start after Baker Mayfield and Case Keenum reportedly fail to test out of protocols | CBS Sports Headlines Browns' Nick Mullens to start after Baker Mayfield and Case Keenum reportedly fail to test out of protocols The NFL’s protocol update didn’t help Cleveland’s quarterback situation ESN … Continue reading Browns' Nick Mullens to start after Baker Mayfield and Case Keenum reportedly fail to test out of protocols