Baseball's union head says people should wait for all the facts before making conclusions about NL MVP Ryan Braun.

The Milwaukee Brewers' star tested positive for a performance-enhancing substance and is appealing to an arbitrator. The case is not likely to be determined until next month at the earliest. If the positive test is upheld, Braun would face a 50-game suspension as a first offender.

Players' association leader Michael Weiner says in a statement Tuesday that the drug agreement is designed to protect a player from "a rush to judgment." He adds that "fairness dictates that Ryan Braun be treated no differently."