Larry Nelson hit 68.6 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		Larry Nelson L. Nelson	68.6	1980	103	9	1	71.3	114	73.9	254.9		44.4			$182,715

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