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

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

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.

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.

One more shot from ground level.

Stay tuned to the Titleist Tour Blog for more pictures and updates from Aronimink!

Rickie gives his new Prototype MB's a full inspection.