2021 US Open golf odds: Phil Mickelson +5000 long shot to complete career Grand Slam at Torrey Pines after historic victory at PGA Championship

Phil Mickelson opened at +20000 to win last week's PGA Championship at Kiawah Island in South Carolina, but Lefty stunned the sports world by taking home the Wanamaker Trophy on Sunday at nearly age 51, becoming the oldest major championship winner in Tour history. The lone major Lefty hasn't won is the U.S. Open, which is being held June 17-20 at Torrey Pines in San Diego, a course that Mickelson knows as well as any. William Hill Sportsbook oddsmakers have opened Mickelson at +5000 to complete the career Grand Slam.

The largest bet William Hill took on Mickelson to win the PGA Championship when he was a +20000 long shot was only $100. Yet, him winning still was a loser for the book overall because while there was little pre-tournament action on him, it started coming in heavy on Saturday and Sunday.

"We lost low six figures overall [in Nevada]," William Hill assistant director of trading Adam Pullen told ESPN. "We lost over a million dollars when Tiger won the Masters a few years ago. I think this is probably the second-biggest [golf] loss after Tiger that we've had."

Lefty became the first golfer with odds of +20000 or longer to win a major since Louis Oosthuizen won the 2010 Open Championship at about the same price. Mickelson is now just the 14th man to win six or more majors in his career.

Mickelson entered the PGA Championship ranked 115th in the Official World Golf Ranking. That was the lowest by any major champion since Shaun Micheel was 169th when he took the 2003 PGA Championship. Mickelson also became the fourth golfer in PGA Tour history to win in four different decades. He joined Sam Snead, Raymond Floyd and Davis Love III.

Lefty will turn 51 during the U.S. Open – June 16. He has infamously finished second six times in that event. Mickelson grew up in the San Diego area and knows Torrey Pines intimately. The course annually hosts the Famers Insurance Open, which Mickelson has won three times – but not since 2001. He finished T51 back in January in that event. Torrey Pines hosted the 2008 U.S. Open, won by Tiger Woods in that epic 19-hole Monday playoff over Rocco Mediate. Lefty finished T18.

Mickelson will honor his commitment to play the Charles Schwab Challenge this week at Colonial in the Dallas/Fort Worth area. He has won the Colonial twice in his career (2000, 2008) but hasn't come close to contention in three trips since his last win there. Mickelson says this will be his final tournament before the U.S. Open.

He is +6600 to win the Charles Schwab Challenge. Dallas native Jordan Spieth and Justin Thomas opened as the +1000 favorites. Spieth won this event in 2016 and has been runner-up twice. 

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