Guess whose Pro V1x? (If you said Hunter Mahan, you're correct.)

Pro V1x loyalist Padraig Harrington takes a quick break from the major preparation.

Here's the view...

Titleist Brand Ambassador Charley Hoffman smiles for our camera. Thanks Charley!

Titleist Brand Ambassador S.Y. Noh grinds away on the Congressional range. Stay tuned for more pics tomorrow, thanks!

Dave Phillips of the Titleist Performance Institute looks on as Titleist Brand Ambassador Zach Johnson tests a new Vokey Design Spin Milled wedge to help with the heavy sand in Congressional's bunkers.

Rough has also been known to be a bit on the lengthy side at U.S. Opens.

Here he rips his Titleist 910D3 8.5º (Graphite Design Tour AD DI-6) driver down the middle of the fairway.

Congressional will be playing as a par-71 this week at 7,574 yards.

Titleist Brand Ambassador Matteo Manassero has put in an order for some fresh grooves.