The 2018 WGC-Bridgestone Invitational was a professional golf tournament held August 2–5 on the South Course of Firestone Country Club in Akron, Ohio.

[3] Daniel Berger (2,3), Kevin Chappell (2,3), Jason Day (2,3,4), Rickie Fowler (2,3), Branden Grace (2,3,4), Emiliano Grillo, Charley Hoffman (2,3), Dustin Johnson (2,3,4), Kim Si-woo, Kevin Kisner (2,3), Brooks Koepka (2,3,4), Matt Kuchar (2,3), Anirban Lahiri, Marc Leishman (2,3,4), Hideki Matsuyama (2,3,4), Phil Mickelson (2,3,4), Louis Oosthuizen (2,3), Patrick Reed (2,3,4), Charl Schwartzel (2,3), Adam Scott, Jordan Spieth (2,3), Justin Thomas (2,3,4), Jhonattan Vegas Adam Hadwin did not play.

[4] Kiradech Aphibarnrat (3), Rafa Cabrera-Bello (3), Patrick Cantlay (3,4), Paul Casey (3,4), Bryson DeChambeau (3,4), Tony Finau (3), Ross Fisher (3), Matt Fitzpatrick (3,4), Tommy Fleetwood (3,4), Sergio García (3,4), Brian Harman (3), Tyrrell Hatton (3,4), Zach Johnson, Satoshi Kodaira (3,4), Li Haotong (3,4), Luke List (3), Rory McIlroy (3,4), Francesco Molinari (3,4), Kevin Na (3,4), Alex Norén (3,4), Pat Perez (3,4), Ian Poulter (3,4), Jon Rahm (3,4), Xander Schauffele (3,4), Webb Simpson (3,4), Cameron Smith (3,5), Kyle Stanley (3), Henrik Stenson (3,4), Bubba Watson (3,4), Gary Woodland (3,4), Tiger Woods (3) Justin Rose (3,4,5) did not play.

[4] An Byeong-hun Alexander Björk, Austin Cook, Paul Dunne, Patton Kizzire, Russell Knox, Andrew Landry, Thorbjørn Olesen, Wade Ormsby, Ted Potter Jr., Shubhankar Sharma, Brendan Steele, Brandon Stone, Aaron Wise Thursday, August 2, 2018 Ian Poulter shot an 8-under-par 62 to lead by one stroke over Rickie Fowler and Kyle Stanley.

The scoring average of 68.37 was the lowest opening round of a PGA Tour event this season.