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

Greg's new Prototype CB's were the only left-handed set on the range Monday.

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

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.)

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?