Jay Haas hit 70.1 percent of greens in regulation in 1980.

		NAME	GIR%	SEASON	EVENTS	TOP 10	WINS	SCORING AVG	ROUNDS	FWY%	DRIVING DISTANCE AVG	PUTTING AVG	SAND SAVE%	SCRAMBLING %	FEDEXCUP POINTS	MONEY
1		Jay Haas J. Haas	70.1	1980	112	7		71.3	115	72.4	253.7		43.1			$114,102

StatMuse has season-level data for greens in regulation percent going back to the 1980 season.