Ryan Braun's name appeared on a list made by the founder of the Florida clinic who is linked to supplying performance-enhancing drugs to major league players.
Names found in the handwritten notebook are of players who allegedly received PEDs from Anthony Bosch and owed him money, ESPN's Outside the Lines reported Friday.
Next to Braun's entry was written $1,500, an amount the Milwaukee Brewers first baseman was said to have owed Bosch. Also in the notebook were Alex Rodriguez of the New York Yankees and Melky Cabrera of the Toronto Blue Jays.
ESPN could not provide concrete proof that the list was legitimate or whether Braun ever received PEDs from Bosch or his clinic.
Braun already had surfaced in another report by Yahoo Sports last week on the clinic in connection with another document.
Speaking with reporters Friday at the Brewers' spring-training complex in Phoenix, Braun steered clear of dicussing Biogenesis of America, the now-shuttered clinic at the center of an investigation by Major League Baseball.
"I understand why a lot of you guys are probably here, but I made a statement last week," Braun said. "I stand behind that statement. I'm not going to address that issue any further. As I stated, I'm happy to cooperate fully with any investigation into this matter."