Out of the eight South Africans who started the tournament, only three made the cut for the weekend.
Van Rooyen, who was making his PGA Championship debut, carded a three-over par 73 on Sunday to finish at 1-over for the tournament.
He finished tied for eighth, nine shots behind eventual champion Brooks Koepka, who defended his title.
The 29-year-old banked a cool $ 264 395 (R3.8 million) for his four-day efforts.
Van Rooyen also broke into the Top 100 in the latest world rankings by moving up 17 places to 89th.
Meanwhile, Justin Harding posted a 2-over 72 in his final round to finish T54 on 9-over for the tournament and banked $22 850 (R330 000).
SA’s top-ranked golfer Louis Oosthuizen had a final round to forget as he posted a 9-over 79 to finish tied for 60th at 10-over. Oosthuizen took home $21 300 (R305 000).
Branden Grace , Dylan Frittelli , Shaun Norris , Brandon Stone and Richard Sterne were the five South Africans who failed to make the weekend.
Scores after Sunday’s final round of the 101st PGA Championship at par-70 Bethpage Black:
272 – Brooks Koepka (USA) 63-65-70-74
274 – Dustin Johnson (USA) 69-67-69-69
278 – Jordan Spieth (USA) 69-66-72-71, Patrick Cantlay (USA) 69-70-68-71, Matt Wallace (ENG) 69-67-70-72
279 – Luke List (USA) 68-68-69-74
280 – Kang Sung (KOR) 68-70-70-72
281 – Gary Woodland (USA) 70-70-73-68, Matt Kuchar (USA) 70-70-72-69, Rory McIlroy (NIR) 72-71-69-69, Shane Lowry (IRL) 75-69-68-69, Erik van Rooyen (RSA) 70-68-70-73 , Adam Scott (AUS) 71-64-72-74
282 – Chez Reavie (USA) 68-71-71-72, Jazz Janewattananond (THA) 70-68-67-77
283 – Brandt Snedeker (USA) 74-67-73-69, Mike Lorenzo-Vera (FRA) 68-71-75-69, Abraham Ancer (MEX) 73-70-69-71, Lucas Glover (USA) 72-69-69-73, Lucas Bjerregaard (DEN) 71-69-70-73, Xander Schauffele (USA) 70-69-68-76, Hideki Matsuyama (JPN) 70-68-68-77
284 – Thomas Pieters (BEL) 74-70-71-69, Jason Kokrak (USA) 73-70-71-70, Billy Horschel (USA) 70-72-71-71, Emiliano Grillo (ARG) 76-67-70-71, Jason Day (AUS) 69-74-69-72, Jimmy Walker (USA) 70-70-71-73
285 – Paul Casey (ENG) 70-71-75-69, Graeme McDowell (NIR) 70-72-73-70, Keegan Bradley (USA) 70-70-73-72, Webb Simpson (USA) 72-69-72-72, Adam Hadwin (CAN) 72-70-70-73, Justin Rose (ENG) 70-67-73-75, Sam Burns (USA) 70-72-69-74
286 – Beau Hossler (USA) 72-69-77-68, Li Haotong (CHN) 73-69-70-74, Danny Lee (NZL) 64-74-71-77, Rickie Fowler (USA) 69-69-71-77, Harold Varner (USA) 71-67-67-81
287 – Matt Fitzpatrick (ENG) 75-65-76-71, Charles Howell (USA) 72-67-73-75, Aaron Wise (USA) 70-71-71-75, Kiradech Aphibarnrat (THA) 76-68-68-75, Adam Long (USA) 73-70-69-75, Scott Piercy (USA) 72-67-72-76, Danny Willett (ENG) 71-70-69-77
288 – Henrik Stenson (SWE) 74-68-75-71, Kelly Kraft (USA) 71-65-78-74, Bronson Burgoon (USA) 73-66-74-75, Francesco Molinari (ITA) 72-68-73-75, Tyrrell Hatton (ENG) 71-69-72-76, Tommy Fleetwood (ENG) 67-71-72-78
289 – Charley Hoffman (USA) 73-69-75-72, Justin Harding (RSA) 74-70-73-72 , Cameron Champ (USA) 72-71-73-73, Alex Noren (SWE) 73-69-74-73, J.J. Spaun (USA) 72-72-70-75, Zach Johnson (USA) 71-69-73-76
290 – Ross Fisher (ENG) 74-67-77-72, Rob Labritz (USA) 75-69-74-72, J.T. Poston (USA) 77-67-71-75, Louis Oosthuizen (RSA) 70-68-73-79
291 – Max Homa (USA) 70-71-79-71, Joost Luiten (NED) 72-72-77-70, Corey Conners (CAN) 72-72-76-71, Kurt Kitayama (USA) 74-68-77-72, Cameron Smith (AUS) 73-70-74-74, Thorbjorn Olesen (DEN) 73-70-71-77, Tony Finau (USA) 70-73-69-79
292 – David Lipsky (USA) 70-74-77-71, Rafa Cabrera Bello (ESP) 75-69-74-74, Lucas Herbert (AUS) 74-70-73-75, Phil Mickelson (USA) 69-71-76-76, Daniel Berger (USA) 70-66-78-78, Joel Dahmen (USA) 70-72-71-79
293 – Kevin Tway (USA) 73-70-76-74
294 – Andrew Putnam (USA) 74-70-75-75, Pat Perez (USA) 68-73-76-77
295 – Rich Beem (USA) 75-69-82-69, Ryan Vermeer (USA) 70-74-72-79
299 – Marty Jertson (USA) 72-69-79-79
DM