The union didn’t immediately respond to a request for comment.
A three-time AL MVP, Rodriguez is playing pending his appeal, which is not expected to be decided by arbitrator Fredric Horowitz until at least November.
“I know the evidence against Alex Rodriguez, and I will tell you this: It will never stand up in a court of law or in an arbitration-panel courtroom. Never,” Tacopina told NBC.
“Alex Rodriguez, when we confront this evidence, will have been found not responsible to the point where he shouldn’t serve one inning of a suspension as opposed to 211 games,” Tacopina said. “I know the evidence in this case.”
Rodriguez is among 14 players disciplined by MLB this summer following its Biogenesis investigation. Former NL MVP Ryan Braun accepted a 65-game suspension and 12 players agreed to 50-game penalties.
“If he listens to me, if I were advising him based on the evidence and based on what I know about the evidence,” Tacopina told NBC, “I would tell him, ‘Don’t take one inning, Alex. Forget 50 games. Don’t take one inning.’”