Phil Mickelson's two-driver setup in 2004 is the most memorable. Tommy Fleetwood's edge this week? A 9-wood he's been carrying for years.

"It's a perfect 9-wood golf course," he said. "I can't really hit that high 4-iron, so 9-wood helps me a lot" on the par 5s and the par-3 fourth hole.

The data supports him. In recent Golf Digest robot testing, the 9-wood produced the biggest carry gains of any club tested—nearly seven yards at 95 mph with a slightly descending blow. Maybe Tommy's onto something.