Garnett used the same putter for eight years, but prior to last week's Byron Nelson Championship, he traded the old club for a new putter.
That change is already paying off.
Through two rounds at the Crowne Plaza Invitational at Colonial, Garnett is by himself atop the leaderboard at seven-under par. The Gallatin native has eight birdies through 36 holes, and started Friday with an eagle on the first hole.
But Garnett felt apprehensive about the move at first.
"That's the reason I hadn't switched is the comfort level. This new putter is actually a counter-weight putter that has a little bit extra weight in the handle of the putter. What it's done is kind of slowed my hands down and kept those a little bit more stable through the ball."
Now he finds himself in new territory with the rest of the field chasing him the next two days.
"I think you just have to embrace that position and know that I'm going to feel some nerves tomorrow and feel some nerves on Sunday. I know I have the game to win out here, and so I'll see if I can't finish it off this weekend."
He has one top ten finish so far this season, and landed in the top 30 three times.