Rocco Mediate is a liar. That's OK -- we've all spurned the truth when it suits our needs. We've all fibbed -- or told one stinking whopper -- either out of desperation, spite, or convenience. But few of us have spoken into a microphone and lied so blatantly as Mediate did yesterday after watching his dream of winning golf's U.S. Open take a severe hit. Mediate was grabbed by the NBC folks, just moments after Tiger Woods sunk a 12-foot birdie putt to force an 18-hole pla...