HEMEL HEMPSTEAD, ENGLAND -- Several years ago, Phil Mickelson began wearing aviator sunglasses so frequently they started to feel like a part of his personality.
He wore them initially, he said, for medical reasons during a two-week skin treatment on his face meant to kill hidden cancer cells, a preventative therapy he hoped would heal some of the damage done after a life spent working in the sun. But Mickelson quickly realized how much he enjoyed wearing them, how much he thought they helped him on the golf course. So he wore them everywhere -- during playful videos made for Twitter, during commercials, during interviews, all places he wanted to project the confidence of a man who seemed (at least on the outside) to be reveling in life as he approached his 50s.