#3 - Adam Scott

Titleist still can't get Adam Scott out of the brand's Forged 680 irons from 2005. Yes, 2005. 

While Scott has updated the rest of his Titleist bag in 2017, including the additon of a 3-iron and 5-iron T-MB 718, he continues to play the company's 680 irons in 5-iron through to 9-iron from 12 years back. 

The Australian may be winless since March 2016, but his iron game is still relatively solid, finding 67% of his greens in regulation on the PGA Tour this season.