There is a good chance that there will never be a written decision explaining why Ryan Braun's drug suspension was overturned. The arbitrator who threw out the 50-game suspension of the 2011 National League MVP has been asked by the MLBPA to hold off providing his reasoning while they negotiate changes to their rules for collecting specimens, according to people familiar with the process. If players and owners reach agreement on the changes, the February decision by arbitrator Shyam Das to overturn the penalty for the Milwaukee outfielder could be allowed to stand without any written explanation.