How Phil Mickelson's enthusiasm defied age to make history at PGA Championship

If a single shot personified Phil Mickelson's utter refusal to give in to reason, it came on the 70th hole of his record-breaking PGA Championship victory. As the adrenaline took hold of his 50-year-old frame, his eyeballs popping behind a pair of secret service-like aviators, Mickelson unleashed a ferocious drive that sailed some 366 yards down the middle of the fairway - outmatching any player for distance on the 16th all week. They say Father Time is undefeated, but this was proof that his greatest opponent remains enthusiasm. And it is a testament to Mickelson that even in the twilight...