In Theo Epstein’s mind, this was already case closed years ago.

Then Curt Schilling went on a media blitz last week, first telling an ESPN radio show that “former members” of the Boston Red Sox organization approached him about using performance-enhancing drugs as a “potential path” to rejuvenating his career in 2008.

Schilling then posted on his Twitter account, ruling out ex-teammates and the baseball operations department. The ESPN analyst also cleared Cubs executives Theo Epstein and Jed Hoyer during interviews with Boston outlets and sketched out more details of the investigation.

Epstein didn’t appear eager to dredge up the past after Sunday’s welcome-to-camp news conference at Fitch Park. But in his first public response to Schilling’s story, the Cubs president of baseball operations confirmed the general outline reported by the Boston media and the commissioner’s office.

“It was the only time in my career where a player mentioned performance-enhancing drugs to me,” Epstein said. “I immediately reported it to Major League Baseball. The club did its own investigation. Major League Baseball did a very thorough investigation, including its department of investigations and including the players association.

“They had a lot of conviction about their conclusion. There was no wrongdoing and therefore no discipline on the individual in question.”

Epstein declined to name the Red Sox employee – ESPN Boston identified Mike Reinold, a medical staffer who was not retained after the 2012 season.

“Because of the investigation,” Epstein said, “the individual in question probably has been as thoroughly vetted as anyone in a big-league clubhouse and came out extremely clean. This incident should not be seen as an attack on his integrity whatsoever.”