Phil Mickelson won 2 tournaments in 1997-98.

phil mickelson wins in 1998
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NAMESEASONEVENTSWINSTOP 10SCORING AVGROUNDSGIR%FWY%DRIVING DISTANCE AVGPUTTING AVGSAND SAVE%SCRAMBLING %FEDEXCUP POINTSMONEY
Phil MickelsonPhil Mickelson1997-98832970.37964.067.2283.41.853.558.2$1,837,246
StatMuse has season-level data for tournament wins going back to the 1979-80 season.