Between the 2009-10 and 2018-19 seasons, Dustin Johnson had the most tournament wins, with 18 tournament wins.

most wins 2010's pga tour
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JohnsonMcIlroyDayWatsonSpiethThomasWoodsRoseSnedekerKoepkaReedMickelsonKucharScottWalkerJohnsonHaasDeChambeauMatsuyamaHorschelFowlerSimpson181612121110101087777766655555
NAMEEVENTSWINSTOP 10ROUNDSMONEY
Dustin JohnsonDustin Johnson3651887717$56,690,613
Rory McIlroyRory McIlroy2271677550$44,434,432
Jason DayJason Day3511269680$43,576,375
Bubba WatsonBubba Watson3751252710$38,362,590
Jordan SpiethJordan Spieth1641161585$39,975,664
Justin ThomasJustin Thomas1261044464$30,034,395
Tiger WoodsTiger Woods1331032369$25,841,929
Justin RoseJustin Rose3531071664$43,651,474
Brandt SnedekerBrandt Snedeker423860819$31,839,412
Brooks KoepkaBrooks Koepka162739427$29,284,743
Patrick ReedPatrick Reed189740658$26,912,958
Phil MickelsonPhil Mickelson382750732$34,601,289
Matt KucharMatt Kuchar446786885$42,067,309
Adam ScottAdam Scott311759638$33,754,236
Jimmy WalkerJimmy Walker427643804$24,066,955
Zach JohnsonZach Johnson433648833$28,143,522
Bill HaasBill Haas434646842$25,326,424
Bryson DeChambeauBryson DeChambeau78516258$13,097,775
Hideki MatsuyamaHideki Matsuyama139541518$25,193,234
Billy HorschelBilly Horschel320537739$22,016,422
Rickie FowlerRickie Fowler419568805$37,382,178
Webb SimpsonWebb Simpson440563848$34,027,506
Hunter MahanHunter Mahan429533775$20,102,248
Jason DufnerJason Dufner407539757$23,454,860
Steve StrickerSteve Stricker296536493$20,606,940
StatMuse has season-level data for tournament wins going back to the 1979-80 season.