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

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

One more shot from ground level.

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

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

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

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

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