MLB executive vice president Rob Manfred wrote to lawyer Joseph Tacopina on Monday, urging him to waive his client's confidentiality so the documents could be released.
He says the league would disclose "all drug tests" and "all prior violations" tied to Rodriguez, plus any documents linked to whether Rodriguez obstructed MLB's investigation of the Biogenesis clinic.
According to the letter, which was released by MLB, Rodriguez's side also would be able to disclose documents.
Tacopina said in a statement that the letter was a "publicity stunt" and "a trap," and said a waiver would need the union's approval.
Rodriguez is playing pending his appeal, which likely won't be decided by an arbitrator until at least November.
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