Here's your answer: Titleist Brand Ambassador Charley Hoffman.

Passing rain shower. Don't worry, Titleist Brand Ambassador Rickie Fowler's clubs are staying dry.

Back to the range. Scotty Cameron Tour Rep Kelley Moser talks putters with Titleist Brand Ambassador Brendan Steele.

Titleist Brand Ambassador Marc Leishman came to the TTV this week looking to change grips. He had different grips put on four clubs before heading to the range.

See you next week at the Tour Championship!

Out on the course, Titleist Brand Ambassador Scott Stallings winds up with one of his new Prototype AP2 irons.

Marc decided on the Golf Pride Tour Velvet full cord grips.

Also warming up: Titleist Brand Ambassador Scott Piercy, with Cog Hill's famous red barn lurking at the back of the driving range.

Here's a close-up.