What can be done to protect pitchers

After watching Tampa Bay Rays pitcher Alex Cobb being struck in the head by a line drive, there are renewed calls for changes to be made to improve pitchers’ safety. Perhaps a helmet, similar to those worn by batters would have made a difference in this case. But is there anything that can be done to completely protect players standing less than 60 feet away from a batted ball coming at over 100 miles per hour?