Titleist Brand Ambassador Matt Jones's new Prototype MB irons were re-gripped and delivered to his locker at Arnonimink.

Titleist Brand Ambassador Kevin Na gives his new Prototype AP2 irons a closer look.

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

Scott played 36 holes with his new irons Sunday, and 18 more in Monday's pro-am.

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.

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.

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