Zimmerman denied the accusation -- saying he never met Sly -- then filed suit, he explained, as backing to his words.
Ryan Zimmerman cleared by MLB of PED accusations in documentary →
Mr. Sly said he was recorded without his knowledge and did not know he was talking to an athlete working undercover for Al Jazeera America.
Peyton Manning HGH report from Al Jazeera rebuked by NFL: 'No credible evidence' →
