While no one expects a Woods-like performance this year, the 2-iron will almost surely be a vitally important club for whoever emerges as the champion on Sunday evening.
"I understand how Tiger won in 2006 here," Watson said. "Very simply, he was the best iron player by far during that tournament. By far. His iron play was spot on."
Who knows? Maybe it will come down to the sort of shot Watson pulled off more than three decades ago.
He still summons up with the details like it happened yesterday.
"As soon as I hit the ball, I knew I hit it dead flush," he recalled. "There was a left-to-right wind and the ball started just right of the flag and hooked off the flag."
His caddie, Alfie Fyles, shouted, "Stop hooking."
"Alf," Watson replied, "don't worry.'
The ball wound up 15 feet from the hole.
Two putts later, Watson had his fifth Open title.
Follow Paul Newberry on Twitter at www.twitter.com/pnewberry1963