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.

Titleist Brand Ambassador Kevin Na put in some Titleist 910 hybrid work with Senior Club Fitting Analyst Dino Antenucci. Kevin is trying to determine the best mixture of lofts in his hybrids and fairway metals for the week.

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.

The par-35 back nine is actually longer (3,872 yards) than the par-3 front side (3,702).

Vokey Tour Rep Aaron Dill has been busy at the grinding wheel in the Titleist Tour Van.

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

Bob Vokey to the rescue! (We'll explain more in the next slide...)

This player accidentally dinged the face of his trusty Vokey wedge with a rock and asked Bob to see if he could repair the damage.