NEW YORK -- The drug test that resulted in Jenrry Mejia's 162-game suspension for PEDs was conducted while the New York Mets reliever was still serving his original suspension, not after he was activated on July 7, a source tells ESPN's T.J. Quinn.

Mejia had been active for three weeks when Major League Baseball announced the suspension on Tuesday due to a positive test for the anabolic steroids Stanozolol and Boldenone.

Mejia spent most of the season serving an 80-game suspension for a positive test for Stanozolol.

"Not surprisingly, there's a tremendous amount of disappointment -- I think to some extent anger, to some extent amazement -- that this could happen so soon after a previous suspension was completed. And some sadness," Mets general manager Sandy Alderson said on Tuesday. "This is having a tremendously adverse effect on a very promising major league career, and that's a shame. But the rules are the rules. We support the rules. This is the consequence of making bad choices."