Watson edged Eaks and Craig Stadler on the second playoff hole -- the third time the trio had played the 18th hole in an hour. Watson gave an emphatic fist pump as the ball dropped, ending the largest playoff in Champions Tour history.

Watson, who won the Senior PGA Championship in May for his first major, watched a chance to win the tournament in regulation slip away with an errant tee shot on No. 17 that found a lake fronting the par 3. That dropped Watson back to 9 under par and into a swarm of other golfers who posted the same number.

"The only thing you like about being in that playoff is when you come out on top," Watson said.

The previous Champions Tour playoff record was five players, which happened twice. The PGA TOUR record is six players.

To start this playoff, all seven went off the 18th tee in the same group, but only Morgan was in position to reach to the green in two. His 5-wood was struck well, but the ball was slightly left of the flag and landed in the bunker next to the green.

Eaks hit a perfect pitch with his third shot to 18 inches, putting pressure on the others. Watson hit his wedge over the green onto the fringe, but chipped in from 23 feet, forcing others to make birdie to stay in the playoff.

Only Eaks and Stadler were able to match. Stadler confidently sunk his 22-foot putt, while Eaks patiently waited before tapping in his birdie putt.

Watson, Eaks and Stadler went back and played 18 again. All three reached the green in two, but Watson kept the playoff from continuing. Eaks missed a 12-footer and Stadler's long eagle putt from the front of the green was just short.

"It's tough to win. The emotions that grab a hold of you," Watson said. "People who haven't done it don't understand it."

Read More: Watson Wins Record-Setting Seven-Man Boeing Classic Playoff [PGA Tour]

Denis Watson - 2007 Results