Why Phil Mickelson's quest to win the career Grand Slam won't get any easier

Phil Mickelson second chance to complete the career Grand Slam got off to a promising start, but the six-time U.S. Open runner-up wound up leaving Chambers Bay with a disappointing T-64. With a back-end finish like that and just five more years before he becomes eligible for the Champions Tour, what's next for the aging star in his pursuit of golf history?

Unfortunately for Phil, it doesn't get any easier.