The players' association believes the leak of NL MVP Ryan Braun's drug test was an isolated occurrence.
Speaking Sunday at the Milwaukee Brewers' training camp, union head Michael Weiner says "the leak was specific to this case" and "does not threaten the confidentiality of the program."
ESPN reported in December that Braun tested positive for elevated testosterone. Representatives of the Milwaukee outfielder argued during a grievance hearing that specified procedures for handling the sample were not followed, and arbitrator Shyam Das last month overturned the 50-game suspension Braun faced.
Weiner says "the idea that there is confidentiality to the appeals process is critical. If we felt there was a real threat to that here, we'd have a big problem."