The more I thought about the Six Degrees of Doping with Johan Bruyneel game, the more I didn't like my Richard Virenque answer. The Kevin Bacon game starts with Actor X and works its way back to Mr Bacon.

I started with Johan, went through Boonen and then to Virenque. I suppose I could just reverse that order. To make it more difficult though I will make the first degree an actual teammate of Virenque when he was busted.

So...
Virenque was a teammate of Moreau during the Festina affair.
Moreau was a teammate of Tomas Vaitkus at AG2r
Vaitkus was on Discovery Channel which brings you to...
Johan Bruyneel

3 degrees.