Mickelson playing week before US Open, tuning up his game after poor performance at Masters

Phil Mickelson is playing the week before the U.S. Open to make sure he's tuned up, particularly after not playing very well at the Masters after taking off before that major.

He's got plenty of company at the St. Jude Classic.

The TPC Southwind course plays at a par-70 over 7,239 yards and features small greens that don't hold shots easily, challenging fairways and enough rough to provide a good test before golfers head to Merion Golf Club in Pennsylvania. That's why Brandt Snedeker and Boo Weekley are here, giving this tournament a field featuring five of the current top 10 money leaders.

Dustin Johnson is back to defend his title. Guan Tianlang, the 14-year-old from China, also is here on a sponsor's exemption along with local favorite John Daly.