The Englishman led the European Tour's Order of Merit from 1971 to 1974 and finished second at The Open twice, in 1974 and 1982.
After that, he started working as a TV pundit and was given an Alzheimer's diagnosis in 2014.
"This is an incredibly sad day for everyone who was lucky enough to know Peter, but also for the game of golf as a whole," stated Bernard Gallacher, his former Ryder Cup teammate.
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