Phil Mickelson has six runners-up finishes in the U.S. Open in his 21 years on tour. Will he ever win the national championship and complete his career grand slam?

Mickelson had another solid year in a career that has seen 42 PGA Tour victories and 51 world wide wins.

Winning the 2013 Scottish Open at Castle Stuart the week prior to the Open Championship gave Mickelson his first win on European soil. It also had to be satisfying to him because it cemented his legacy as one of the best golfers of his era.

Mickelson has won all over the world and on every type of golf course. If a professional never wins in Europe, and to be sure in Scotland, can he truly be considered one of the best ever?

Mickelson completely erased all of those concerns last year with his win at the Scottish Open and then by winning the Open Championship on a nearly unplayable golf course.

He put on a clinic in Scotland last year and that was especially true at Muirfield. Precision iron play, excellent putting and his phenomenal short-game skills place Mickelson clearly at the top of golf’s elite.

The one lasting thorn in “Phil the Thrill’s” side is never to have won the U.S. Open.

He has been runner-up on six different occasions, most recently just last year at Merion, to Justin Rose the month prior to his spectacular wins in Scotland.

Only Bobby Jones, Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Tiger Woods have won career grand slams.

Not all great players complete a career grand slam.

Sam Snead like Mickelson never won a U.S. Open, although he finished runner-up four times. Arnold Palmer and Tom Watson never won a PGA Championship.

Mickelson will turn 44 years old during the 2014 U.S. Open.

Does he still have one more major championship win in the tank?