The Drug Enforcement Administration and Major League Baseball are investigating a Miami-area man named Anthony Bosch — who has worked closely with Alex Rodriguez — for Bosch's possible links to performance-enhancing drugs, sources have told the Daily News. The sources asked not to be identified because of the ongoing probe.

Bosch, a well-known figure among current and former Latin ballplayers in South Florida, has advised the embattled Yankee superstar on nutrition, dietary supplements and training, a source familiar with Miami-area anti-aging centers told The News.

The source said Rodriguez and Bosch consulted with at least one other expert about blood test results. Bosch, records show, has been affiliated with a number of Miami-area medical companies and clinics.

Major League Baseball investigators have turned over information about Bosch and his father, physician Pedro Publio Bosch, to federal investigators, sources have told the Daily News. Bosch and his father had already come under scrutiny from MLB and the DEA in 2009 for their links to Manny Ramirez after the then-Dodgers slugger was suspended that year for 50 games for using a banned substance.

The Daily News reported in June of 2009 that the DEA initiated an administrative review of Pedro Bosch because investigators suspected he wrote a prescription for the banned drug used by Ramirez, who was banned for violating MLB's drug policy that year.

Anthony Bosch was described by the Daily News and other media outlets in 2009 as being well-known in Latin-American circles, his relationship with players dating as far back as the early 2000s when he attended parties with players and attended games in New York and Boston.

Sources involved in the probe have told The News that MLB and federal investigators are trying to determine if Anthony Bosch and his father are involved in supplying banned substances to ballplayers.