If you guessed Jason Dufner, you're correct.

Looks like Gary's got a new 260•08 with some fresh grooves.

Titleist Brand Ambassador Matteo Manassero makes a quick autograph stop.

Also in Matteo's bag: 910D2 9.5º driver, 910F 13.5º fairway metal, 910H 17º & 20º hybrids, AP2 irons (4-PW) and Scotty Cameron Tour Newport Select putter.

Titleist Advisory Staff member filmed his popular TV show "The Golf Fix with Michael Breed" on the range at Bay Hill this week.

Titleist Brand Ambassador Erik Compton is making his third consecutive start at the Arnold Palmer Invitational.

There's Erik's Titleist bag. Let's take a closer look at that putter...

Here's what Erik sees when he's making all those putts.

Also in Erik's bag: 910D3 8.5º driver, 910F 13.5º fairway metal, 909H 19º & 21º hybrids, CB (4-5) and MB (6-9) irons and Vokey Design Spin Milled 52º and 58º wedges.

Titleist Brand Ambassador Rickie Fowler puts in some work on the putting green as Vokey Tour Rep Aaron Dill (left) looks on.