Major League Baseball has been informed by Tony Bosch, head of the South Florida wellness clinic, that he will testify about his relationship with performance-enhancing drugs and dozens of baseball players, a move that could lead to suspensions for Alex Rodriguez, Ryan Braun and other notable major leaguers, according to a person familiar with the negotiations.

The person spoke to USA TODAY Sports on condition of anonymity because negotiations with Bosch are ongoing. ESPN first reported an agreement with Bosch and MLB.

The agreement would be a significant boon in baseball's efforts to corroborate reports, initially from the Miami New Times, that Rodriguez, Toronto Blue Jays outfielder Melky Cabrera and more than 20 other players received banned substances from Biogenesis, a since-shuttered wellness clinic.

Cabrera, when approached by USA TODAY Sports before the Blue Jays played his old team, the San Francisco Giants on Tuesday night, said he had no knowledge of a possible suspension. Cabrera served a 50-game suspension last season when he tested positive for testosterone, missing the Giants' run to the World Series title.

"I don't know anything about it," Cabrera said in Spanish. "This is the first I hear of it. If they suspend me again, I think that would be a harsh punishment because I already served my sentence. But it's up to them.

"I believe I've already served my sentence, especially missing the playoffs. That's what hurt me the most, getting suspended and not being able to play in the playoffs.''

Braun smiled as he spoke to reporters after the Milwaukee Brewers' walkoff win over the Oakland Athletics, saying the threat of suspension was not on his mind.

"The truth has not changed," he said, according to MLB.com. "I don't know the specifics of the story that came out today, but I've already addressed it, I've already commented on it, and I'll say nothing further about it."

Bosch, according to ESPN, will meet with MLB investigators within a week. MLB had filed suit against Bosch in March, but ESPN reported MLB will drop that suit in exchange for Bosch's cooperation.