Titleist Brand Ambassador Joe Affrunti is making his first start this week as a PGA Tour rookie. Affrunti earned his card by finishing 22nd on last year's Nationwide Tour money list.

Here's a close-up of Joe's Scotty Cameron Newport Squareback Select prototype putter.

Titleist Brand Ambassador Zach Johnson signs some autographs for his Hawaiian fans.

Pro V1 loyalist Charlie Wi hits out of a bunker during Monday's practice round.

Scotty Cameron has been hard at work this week at Waialae Country Club. Here he chats with Titleist Brand Ambassador Matt Jones.

Here Kelly talks with Titleist Brand Ambassador Marc Leishman, who shot a 60 during one of his warm-up round last week at home in Australia. Marc's Scotty Cameron Circa 62 is working just fine.

Here's a look into Leishman's Titleist bag: Marc plays a mixed set of Titleist irons (AP2 2-4, MB 5-9) and carries three Vokey wedges (48, 54, 58), featuring a little rust from Australian ocean breezes.

Let's take a look inside Joe's Titleist bag...

Joe also carries Titleist AP2 irons with True Temper Dynamic Gold shafts...