Check out this funny video where the PGA Tour goes in depth with Kevin Na and his signature move of walking in putts.
Danny Lee six-putts from four-feet, slams putter, withdraws with wrist injury
Justin Thomas leads US Open: First round video highlights
US Open caddie gives hilarious tour of dodgy motel room
US Open at Winged Foot looks like it will be brutal for everybody
Rewatch Geoff Ogilvy's 2006 US Open victory at Winged Foot