Between the 2017-18 and 2020-21 seasons, Justin Thomas and Dustin Johnson were tied for the most tournament wins, with 8 tournament wins.

most wins pga tour since 2017-18 to 2020-21
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ThomasJohnsonDeChambeauCantlayMcIlroyKoepkaMorikawaRahmReedNaChampMickelsonSimpsonLeishmanWoodsRoseWatsonMolinariHovlandHomaToddHerman8876665544333333332222
NAMEEVENTSWINSTOP 10ROUNDSMONEY
Justin ThomasJustin Thomas84834313$27,589,098
Dustin JohnsonDustin Johnson74835270$24,830,374
Bryson DeChambeauBryson DeChambeau86732312$23,705,631
Patrick CantlayPatrick Cantlay80626285$19,842,591
Rory McIlroyRory McIlroy73635260$20,995,806
Brooks KoepkaBrooks Koepka71625243$23,105,416
Collin MorikawaCollin Morikawa53518191$14,065,666
Jon RahmJon Rahm77540274$22,648,540
Patrick ReedPatrick Reed94426337$16,869,215
Kevin NaKevin Na92416305$12,256,009
Cameron ChampCameron Champ7237222$6,140,690
Phil MickelsonPhil Mickelson83311273$11,236,515
Webb SimpsonWebb Simpson82329297$17,947,743
Marc LeishmanMarc Leishman88320300$13,874,597
Tiger WoodsTiger Woods40313155$10,790,694
Justin RoseJustin Rose65323229$14,759,363
Bubba WatsonBubba Watson85317277$10,790,466
Francesco MolinariFrancesco Molinari56311192$9,713,702
Viktor HovlandViktor Hovland44210154$7,031,047
Max HomaMax Homa74211233$6,965,240
Brendon ToddBrendon Todd6427208$4,992,608
Jim HermanJim Herman7322200$2,523,417
Billy HorschelBilly Horschel99222338$12,917,263
Harris EnglishHarris English105216342$10,928,219
Stewart CinkStewart Cink8127271$6,342,155
StatMuse has season-level data for tournament wins going back to the 1979-80 season.