The man who turned the Biogenesis clinic from a quiet investigation in Miami into a national scandal says there are at least a dozen more athletes whose names haven't been exposed and that they come from across the sports world.

Porter Fischer, the former Biogenesis of Miami clinic employee who turned boxes of documents over to the Miami New Times last year, declined to name the athletes. But in his first television interview, Fischer told "Outside the Lines" that numerous sports had at least one athlete who received performance-enhancing drugs from clinic founder Tony Bosch.

Porter Fischer is the man who brought the Biogenesis scandal public, by providing documents to a Miami newspaper that named MLB players as PED clients. Nicole Noren/ESPN

"This isn't a 2013 thing or a 2012 thing; some of these people have been on the books since 2009," Fischer said.

Fischer said he and associates have identified athletes from the NBA, NCAA, professional boxing, tennis and MMA, in addition to other professional baseball players who have not yet been identified. As far as he knows, Fischer said, Bosch had no clients from the NFL or NHL.

He said the only sports entity he has heard from was Major League Baseball.

The athletes not yet publicly named come from the documents Fischer took from the clinic, documents he said another employee asked him to take for safekeeping. The number of athletes involved with the clinic, based on what he saw and heard during his time with Biogenesis, is far more than people realize, he said.

"In just the four years that I know, it's got to be well over a hundred, easy," he said. "It's almost scary to think about how many people have gone through [Bosch's treatments] and how long he's gotten away with this."

Bosch has been cooperating with MLB for more than a month, providing what sources have said are extensive records of his connection to 20 to 25 players. The Milwaukee Brewers' Ryan Braun was already confronted with evidence, and he agreed to a season-ending 65-game suspension and forfeited his remaining salary for the year. Other suspensions, including for the New York Yankees' Alex Rodriguez, are expected within the next two weeks.

In Fischer's interview with "Outside the Lines," he said he never expected the insanity that turned his life "upside down" after he released the documents.

Fischer was a client of Bosch's for two years, believing the man known as "Dr. T" was a medical doctor. Bosch is not but has presented himself as one for years, treating patients like Fischer with weight-loss regimens of prescription drugs. Fischer, who worked in marketing for years, said he offered to start a marketing campaign for Biogenesis last year and that Bosch responded by asking him to invest in the company.

Fischer said he gave Bosch $4,000 in September with the promise he would get $4,800 in return. Fischer was named the company's marketing director. After receiving $1,200, he said the payments stopped. Several former Bosch associates said they were also owed money.