FOX19 - Pete Rose bet on baseball while playing with the Cincinnati Reds in 1986, according to documents obtained in an ESPN investigation.
Through the years, Rose has maintained he placed bets as a manager, but never as a player.
The documents are copies of pages from a notebook seized from the former home of Michael Bertonlini, an associate who allegedly recorded bets for Rose.
The notebook details Rose's betting records during a six-month period in 1986 and shows no evidence that Rose bet against his team.
"On 21 of the days it's clear he bet on baseball, he gambled on the Reds, including on games in which he played," the ESPN report states.
Prosecutors had sworn testimony and a recorded conversation implicating Rose gambled on his team, but the notebook is the first written documentation.
"This is the final piece of the puzzle on a New York betting operation with organized crime. And, of course, [Rose] betting while he was a player," ESPN quotes John Dowd, the former federal prosecutor who led the 1989 investigation into Rose's transgressions.
The all-time leader in hits applied was banned from the league in 1989. In a statement issued through his attorney, Rose, who applied for reinstatement to baseball earlier this year, declined to comment on the findings.
"I'm eager to sit down with Manfred to address my entire history - the good and the bad - and my long personal journey since baseball. That meeting likely will come sometime after the All-Star break. Therefore at this point, it's not appropriate to comment on any specifics."
Major League Baseball has not yet commented on the recent report.