San Francisco ? San Francisco Giants outfielder Jose Guillen, left off the team’s postseason roster, is linked to a federal investigation into shipments of performance-enhancing drugs, The New York Times reported on its website Thursday.

The story, citing several unidentified lawyers, said federal authorities told Major League Baseball they were looking into shipments of human growth hormone, allegedly sent to Guillen’s wife in the Bay Area.

That was just before the postseason began, The Times said. Guillen was left off the roster for all three rounds because of a neck injury, according to manager Bruce Bochy.