He told little white lies ... and he took little blue pills. Roger Clemens, whose claims he never took steroids are under federal investigation, has apparently discovered the benefits of another performance-enhancing drug sweeping the sports world - Viagra. Clemens stashed the clearly marked, diamond-shaped pills in a GNC vitamin bottle in his locker at Yankee Stadium, according to a source familiar with the clubhouse, perhaps keeping the drug undercover to avoid the inevitable wisecracks about all the girlfriends he needed to please.