Golfweek’s Heat Index rankings heading into the PGA Championship shows Rory McIlroy as the No. 1 player in golf.
McIlroy is fourth in the Official World Golf Rankings and is third in the Golfweek/Sagarin rankings, but should be considered the golfer to beat at Bethpage Black.
Tiger Woods is No. 2 in these Heat Index rankings, with Dustin Johnson, the World No. 1, is third. Justin Thomas is fourth, but he withdrew from the event on Monday with a wrist injury.
| Heat Index | GW/Sagarin | OWGR | |
| Rory McIlroy | 1 | 3 | 4 |
| Tiger Woods | 2 | 4 | 6 |
| Dustin Johnson | 3 | 1 | 1 |
| Justin Thomas | 4 | 5 | 5 |
| Matt Kuchar | 5 | 15 | 13 |
| Jon Rahm | 6 | 8 | 11 |
| Rickie Fowler | 7 | 2 | 10 |
| Jason Kokrak | 8 | 25 | 66 |
| Ian Poulter | 9 | 17 | 28 |
| Hideki Matsuyama | 10 | 20 | 30 |
| Tommy Fleetwood | 11 | 9 | 16 |
| Xander Schauffele | 12 | 23 | 9 |
| Jim Furyk | 13 | 39 | 50 |
| Kevin Kisner | 14 | 29 | 24 |
| Jason Day | 15 | 21 | 14 |
| Sergio Garcia | 16 | 26 | 26 |
| Bryson DeChambeau | 17 | 10 | 8 |
| Justin Rose | 18 | 6 | 2 |
| Scott Piercy | 19 | 44 | 64 |
| Patrick Cantlay | 20 | 12 | 17 |
| Marc Leishman | 21 | 19 | 23 |
| Tony Finau | 22 | 7 | 15 |
| Gary Woodland | 23 | 11 | 25 |
| Webb Simpson | 25 | 16 | 19 |
| Francesco Molinari | 26 | 13 | 7 |
| Joost Luiten | 29 | 45 | 69 |
| Sung Kang | 30 | 93 | 75 |
| Matthew Fitzpatrick | 31 | 32 | 34 |
| Bubba Watson | 32 | 38 | 18 |
| Jorge Campillo | 35 | 71 | 59 |
| Paul Casey | 36 | 22 | 12 |
| Jhonattan Vegas | 37 | 56 | 80 |
| Graeme McDowell | 38 | 64 | 120 |
| Charles Howell III | 39 | 37 | 51 |
| Rafa Cabrera Bello | 40 | 31 | 36 |
| Brooks Koepka | 42 | 14 | 3 |
| Adam Scott | 44 | 28 | 27 |
| Louis Oosthuizen | 45 | 18 | 21 |
| Lucas Glover | 47 | 30 | 83 |
| Russell Knox | 48 | 43 | 68 |
| Patrick Reed | 49 | 27 | 20 |
| Kevin Na | 50 | 46 | 49 |
| Michael Lorenzo-Vera | 52 | 81 | 115 |
| Byeong Hun An | 54 | 33 | 57 |
| Brandt Snedeker | 56 | 49 | 52 |
| Justin Harding | 58 | 95 | 42 |
| Billy Horschel | 59 | 36 | 43 |
| Sungjae Im | 60 | 72 | 60 |
| Michael Thompson | 61 | 103 | 111 |
| Haotong Li | 62 | 41 | 37 |
| Ryan Moore | 63 | 57 | 77 |
| Thomas Pieters | 64 | 48 | 92 |
| Joel Dahmen | 65 | 58 | 81 |
| Max Homa | 66 | 224 | 100 |
| Adam Hadwin | 68 | 59 | 78 |
| Jordan Spieth | 70 | 53 | 39 |
| Eddie Pepperell | 72 | 34 | 33 |
| Richard Sterne | 73 | 121 | 131 |
| Keegan Bradley | 75 | 35 | 35 |
| Emiliano Grillo | 79 | 42 | 61 |
| Martin Kaymer | 80 | 152 | 186 |
| Dylan Frittelli | 81 | 60 | 96 |
| Cameron Smith | 82 | 65 | 29 |
| Alexander Björk | 83 | 98 | 85 |
| Mikko Korhonen | 84 | 109 | 87 |
| Matt Wallace | 85 | 74 | 31 |
| Keith Mitchell | 86 | 87 | 56 |
| Si Woo Kim | 87 | 84 | 53 |
| Brian Gay | 88 | 52 | 137 |
| Sam Burns | 92 | 136 | 113 |
| Tom Lewis | 93 | 80 | 67 |
| Henrik Stenson | 94 | 40 | 40 |
| Chez Reavie | 95 | 112 | 65 |
| David Lipsky | 96 | 158 | 118 |
| Pat Perez | 97 | 73 | 90 |
| C.T. Pan | 98 | 51 | 54 |
| Zach Johnson | 102 | 66 | 91 |
| Abraham Ancer | 106 | 61 | 62 |
| Patton Kizzire | 109 | 123 | 98 |
| Phil Mickelson | 110 | 67 | 22 |
| Lee Westwood | 112 | 47 | 71 |
| Jazz Janewattananond | 116 | 140 | 72 |
| Lucas Bjerregaard | 118 | 63 | 44 |
| Lucas Herbert | 118 | 146 | 94 |
| Branden Grace | 120 | 77 | 48 |
| Troy Merritt | 124 | 100 | 185 |
| Luke List | 125 | 91 | 76 |
| Aaron Wise | 127 | 88 | 63 |
| Daniel Berger | 130 | 89 | 89 |
| Ryan Palmer | 132 | 124 | 73 |
| Shugo Imahira | 137 | 97 | 74 |
| Shane Lowry | 139 | 82 | 45 |
| Tyrrell Hatton | 143 | 54 | 38 |
| Charley Hoffman | 144 | 101 | 70 |
| Ross Fisher | 146 | 141 | 105 |
| Erik van Rooyen | 148 | 142 | 106 |
| Jimmy Walker | 152 | 110 | 107 |
| Andrew Putnam | 166 | 79 | 58 |
| Beau Hossler | 178 | 108 | 110 |
| Alex Noren | 185 | 62 | 32 |
| Joaquin Niemann | 187 | 90 | 141 |
| Ryan Fox | 188 | 96 | 84 |
| Thorbjørn Olesen | 191 | 78 | 55 |
| Kurt Kitayama | 195 | 192 | 108 |
| Richy Werenski | 212 | 127 | 206 |
| J.B. Holmes | 214 | 107 | 46 |
| Martin Trainer | 223 | 402 | 133 |
| Ryan Armour | 226 | 113 | 117 |
| Kiradech Aphibarnrat | 227 | 130 | 41 |
| Kyle Stanley | 228 | 104 | 47 |
| Corey Conners | 231 | 234 | 86 |
| Danny Lee | 232 | 120 | 119 |
| J.J. Spaun | 233 | 105 | 148 |
| Harold Varner III | 261 | 118 | 174 |
| Adrian Otaegui | 272 | 191 | 82 |
| Shaun Norris | 281 | 275 | 99 |
| Jason Dufner | 294 | 364 | 187 |
| Steve Stricker | 303 | 126 | 433 |
| Danny Willett | 307 | 197 | 88 |
| Kevin Tway | 311 | 115 | 104 |
| Adam Long | 314 | 294 | 121 |
| Chesson Hadley | 327 | 264 | 95 |
| Brian Harman | 340 | 199 | 93 |
| Y.E. Yang | 369 | 326 | 203 |
| Satoshi Kodaira | 374 | 404 | 79 |
| Cameron Champ | 402 | 114 | 102 |
| Bronson Burgoon | 466 | 274 | 179 |
| Brandon Stone | 503 | 335 | 152 |
| Michael Kim | 560 | 642 | 362 |
| Julian Suri | N/R | 24 | 97 |
| Padraig Harrington | N/R | 259 | 240 |
| Brendan Jones | N/R | 317 | 101 |
| Daniel Balin | N/R | N/R | 2057 |
| Alex Beach | N/R | N/R | 2057 |
| Rich Beem | N/R | N/R | 2057 |
| Rich Berberian Jr. | N/R | N/R | 2057 |
| Justin Bertsch | N/R | N/R | 2057 |
| Craig Bowden | N/R | N/R | 2057 |
| Jason Caron | N/R | N/R | N/R |
| Ben Cook | N/R | N/R | N/R |
| John Daly | N/R | N/R | 1848 |
| Stuart Deane | N/R | N/R | 2057 |
| Andrew Filbert | N/R | N/R | 2057 |
| Tyler Hall | N/R | N/R | N/R |
| Craig Hocknull | N/R | N/R | 2057 |
| Marty Jertson | N/R | N/R | 2057 |
| Rob Labritz | N/R | N/R | N/R |
| Brian Mackey | N/R | N/R | N/R |
| Shaun Micheel | N/R | N/R | 2057 |
| John O’Leary | N/R | N/R | N/R |
| Rod Perry | N/R | N/R | 2057 |
| Casey Russell | N/R | N/R | N/R |
| Jeff Schmid | N/R | N/R | N/R |
| Cory Schneider | N/R | N/R | N/R |
| Vijay Singh | N/R | N/R | 506 |
| Ryan Vermeer | N/R | N/R | 2057 |
