Here's a closer look.

This new Prototype MB iron belongs too... (Note the custom-stamped "C") ... Titleist Brand Ambassador Charley Hoffman.

The Titleist Tour Van has pulled out of Aronimink, but stay tuned tomorrow for more updates.

Here's what they look like in the bag.

Marni Ines of Titleist Golf Club R&D looks on during Gary's first testing session.

Woodland plays Titleist Pro V1 golf balls.

Ryuji games 4-9 MB irons with True Temper Dynamic Gold shafts.

Time to check some numbers on the launch monitor.

Ryuji chats with Titleist Tour Rep Chris Tuten about the new prototype irons.

Another box of new Titleist prototype irons, ready for pickup in the Titleist Tour Van.