Zach played a practice round today with fellow Titleist Brand Ambassador Steve Stricker.

Jason loves to experiment with his equipment and is a regular in the Titleist Tour Van.  With frequent adjustments, sometimes it pays to add a few notations on headcovers, as Jason did here with his 910F 13.5 degree fairway metal.

Rory arrived with a determined sense of purpose on Wednesday and spent a good deal of time honing his putting routine.

Defending champion, Titleist Brand Ambassador Rory McIlroy, is looking to recreate the magic he delivered last year at Congressional.

The 712 Series AP2 irons used by Titleist Brand Ambassador Ben Crane.  Check out the throwback headcovers on his fairway metals.

After his practice round, Bill shared some time with his growing fan base.

Titleist Brand Ambassador Bill Haas is making his fourth appearance at the U.S. Open this week.

Titleist Brand Ambassador Zach Johnson is also playing well heading into the Open.  He recently edged Jason for a big win at the Crowne Plaza Invitational at Colonial.

Titleist Brand Ambassador Jason Dufner is hoping to make his third victory of the year a major.

Here's the staff bag of Titleist Brand Ambassador Geoff Ogilvy, who hoisted the U.S. Open trophy in 2006 at Winged Foot.