From a bio on Watson:
"Watson stood up to Nicklaus on numerous occasions, one of the few golfers who consistently went toe-to-toe with Nicklaus and came out on top.

Their duel at the 1977 British Open - where Nicklaus shot 66-66 over the final two rounds, while Watson shot 66-65 to win by one - is one of the greatest head-to-head battles the sport has ever seen. Watson robbed Nicklaus of another major at the 1982 U.S. Open with his famous chip-in on the 17th hole at Pebble Beach. In fact, in four of Watson's eight major championship wins, Nicklaus was runner-up.

His final PGA Tour victory came in 1998. In 1999, he began playing on the Champions Tour. Watson was Player of the Year in 2003, but the year also was marked by sadness: his longtime caddie, Bruce Edwards, was diagnosed with Lou Gehrig's Disease. Watson co-founded an organization, Driving 4 Life, to fight ALS. He donated $1 million to the foundation, and during 2003 alone Watson helped raise nearly $3 million for ALS-related causes and other charities. "

Choked? Not even close.