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

Looks like Titleist Brand Ambassador Graham DeLaet has a package (new Prototype MB and CB irons).

Out on the range, Titleist Brand Ambassador Jimmy Walker gives his new Prototype MB irons a first test run.

Here's a close-up of Jimmy's new Prototype MB 5-iron.

"The new ones are in the bag," Scott said, " no question about it." (For more reaction from Scott, check out today's Team Titleist Tour Blog post.)

Marni Ines of Titleist Golf Club R&D delivers a few more sets to the Titleist Tour Van.

And here's a right-handed set of the new Prototype CB irons being worked on in the Titleist Tour Van.

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

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

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).