Brian Roberts knows how hard it is to move on from a mistake. He’s reminded of it every time he sits down for an interview.

If you’re one of the few who missed it all, here’s a quick recap: On December 13, 2007, former Senator George Mitchell held a press conference to unveil his now-infamous Mitchell Report: a 409-page document, based on a 20-month investigation, which accused nearly 100 ballplayers of using steroids or other performance-enhancing drugs.

Among the names appearing on the list was that of Roberts.