A few of the new Prototype Titleist irons rest comfortably on the floor of the TTV, awaiting new grips.

Can you guess the owner of these new Prototype MB irons?

The custom Cowboy Orange-paintfill and "R" stamping should give it away…

It's Titleist Brand Ambassador Rickie Fowler, of course.

The Titleist Tour Van is a bit more crowded than usual this week, thanks to all the boxes of new Prototype Titleist AP1, AP2, MB and CB irons (712 series).

The new Prototype AP2 irons are already in the bag of Titleist Brand Ambassador Scott Stallings.

Titleist Tour Rep Scott Cuppett brings a set of new Prototype MB irons out to the range.

Rickie hit the range late Monday afternoon to test out the new clubs for the first time.

Titleist Brand Ambassador Greg Chalmers hits his new Prototype CB irons for the first time.

One more shot from ground level.