Rory McIlroy had his best scoring average in 2020-21, with 70 strokes per round.

rory mcliroy best scoring average last season
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NAMESEASONEVENTSSCORING AVGTOP 10WINSROUNDSGIR%FWY%DRIVING DISTANCE AVGPUTTING AVGSAND SAVE%SCRAMBLING %FEDEXCUP POINTSMONEY
Rory McIlroyRory McIlroy2020-212170717465.857.4319.31.753.057.91,878$4,391,809
StatMuse has season-level data for scoring average going back to the 1979-80 season.