Dave Hill, playing so poorly he had asked to be left on the sidelines, made up for the defeats of Jack Nicklaus and Tom Watson by scoring the decisive point today as the United States took a 12 1/2-7 1/2 victory over Great Britain-Ireland in the Ryder Cup golf matches.

"I've been playing so bad, I asked the captain (Dow Finsterwald) to leave me out of the pairings today," Hill said after his 5-and-4 victory voer Britain's Tommy Horton. "The way I'm playing it's embarassing. And it's downright dangerous to the spectators.

"I changed my mind after talking with some friends and told the captain I'd play if he wanted me to, and that I just hoped I wouldn't embarass him."

An eagle three on the sixth hole - the first eagle of the three-day matches - sent him 4 up and Hill took it from there in the raw, cloudly cold that settled over the dunes and bunkers of the Royal Lytham St. Anne's Golf Club.

It was the United States' 18th triumph in the 22 bennial matches that have been held since 1927. One match ended in a tie. The United States has lost only one since 1935.

Nicklaus, who lost the first four holes to pars, battled back to square the match but eventually fell, up, before 28-year-old Scot Bernard Gallacher, a 10-year veteran of the European tour, Watson, the British Open and Masters champion lost to 20 year-old Nick Faldo, 1 up. Watson's O-foot putt for par spun out of the cup on the final hole.