Duncan Stewart
BY YEAR
| Stone Irish Challenge | CHA | 41 | 2019 | MC | - | 1 | - | 1577th |
| Lalla Aïcha Challenge Tour | CHA | 40 | 2019 | T97 | - | 1 | - | 1554th |
| Hopps Open de Provence | CHA | 39 | 2019 | T56 | - | 1 | - | 1542nd |
| KLM Open | EUR | 37 | 2019 | MC | - | 1 | - | 1517th |
| Porsche European Open | EUR | 36 | 2019 | MC | - | 1 | - | 1501st |
| D+D Real Czech Masters | EUR | 33 | 2019 | MC | - | 1 | - | 1450th |
| Made in Denmark Challenge - Presented by FREJA | CHA | 32 | 2019 | MC | - | 1 | - | 1414th |
| Vierumäki Finnish Challenge | CHA | 31 | 2019 | 63 | - | 1 | - | 1389th |
| Euram Bank Open | CHA | 29 | 2019 | MC | - | 0.9891 | - | 1348th |
| Le Vaudreuil Golf Challenge | CHA | 28 | 2019 | T17 | - | 0.9783 | - | 1328th |
| Italian Challenge Open Eneos Motor Oil | CHA | 26 | 2019 | T56 | - | 0.9565 | - | 1289th |
| Andalucia - Costa del Sol Match Play 9 | CHA | 25 | 2019 | MC | - | 0.9457 | - | 1260th |
| Hauts de France - Pas de Calais Golf Open | CHA | 24 | 2019 | WD | - | 0.9348 | - | 1235th |
| Swiss Challenge Presented by Swiss Golf | CHA | 23 | 2019 | T25 | - | 0.9239 | - | 1201st |
| D+D REAL Czech Challenge | CHA | 21 | 2019 | MC | - | 0.9022 | - | 1160th |
| Prague Golf Challenge | CHA | 19 | 2019 | MC | - | 0.8804 | - | 1123rd |
| Challenge de España | CHA | 18 | 2019 | T20 | - | 0.8696 | - | 1098th |
| Turkish Airlines Challenge | CHA | 17 | 2019 | MC | - | 0.8587 | - | 1069th |
| Magical Kenya Open presented by Absa | EUR | 11 | 2019 | MC | - | 0.7935 | - | 985th |
| South African Open | AFR,EUR | 49 | 2018 | MC | - | 0.6413 | - | 917th |
| Australian PGA Championship | ANZ,EUR | 48 | 2018 | MC | - | 0.6304 | - | 910th |
| Andalucia Valderrama Masters hosted by the Sergio Garcia Foundation | EUR | 42 | 2018 | MC | - | 0.5652 | - | 859th |
| Monaghan Irish Challenge | CHA | 40 | 2018 | T38 | - | 0.5435 | - | 843rd |
| Hopps Open de Provence | CHA | 38 | 2018 | MC | - | 0.5217 | - | 832nd |
| Kazakhstan Open | CHA | 37 | 2018 | MC | - | 0.5109 | - | 817th |
| Bridgestone Challenge | CHA | 36 | 2018 | MC | - | 0.5 | - | 815th |
| Cordon Golf Open | CHA | 35 | 2018 | MC | - | 0.4891 | - | 797th |
| Galgorm Resort & Spa Northern Ireland Open, presented by Modest! Golf | CHA | 33 | 2018 | T16 | - | 0.4674 | - | 779th |
| Vierumäki Finnish Challenge | CHA | 32 | 2018 | MC | - | 0.4565 | - | 761st |
| Swedish Challenge hosted by Robert Karlsson | CHA | 31 | 2018 | MC | - | 0.4457 | - | 731st |
| Euram Bank Open | CHA | 30 | 2018 | T11 | 1.34 | 0.4348 | 0.58 | 719th |
| Le Vaudreuil Golf Challenge | CHA | 29 | 2018 | T8 | 1.56 | 0.4239 | 0.66 | 760th |
| Aberdeen Standard Investments Scottish Open | EUR | 28 | 2018 | T58 | - | 0.413 | - | 808th |
| SSE Scottish Hydro Challenge hosted by Macdonald Hotels & Resorts | CHA | 25 | 2018 | T14 | 1.20 | 0.3804 | 0.46 | 744th |
| Hauts de France Golf Open | CHA | 24 | 2018 | MC | - | 0.3696 | - | 772nd |
| Shot Clock Masters | EUR | 23 | 2018 | 57 | - | 0.3587 | - | 760th |
| Swiss Challenge presented by Association Suisse de Golf | CHA | 22 | 2018 | T33 | - | 0.3478 | - | 740th |
| Belgian Knockout | EUR | 20 | 2018 | T46 | - | 0.3261 | - | 714th |
| Rocco Forte Sicilian Open | EUR | 19 | 2018 | MC | - | 0.3152 | - | 697th |
| Challenge de España | CHA | 18 | 2018 | MC | - | 0.3043 | - | 684th |
| Turkish Airlines Challenge | CHA | 17 | 2018 | T53 | - | 0.2935 | - | 665th |
| Belt & Road Colorful Yunnan Open | CHA,CHN | 15 | 2018 | T36 | - | 0.2717 | - | 641st |
| Barclays Kenya Open | CHA | 12 | 2018 | T38 | - | 0.2391 | - | 619th |
| Tshwane Open | AFR,EUR | 9 | 2018 | MC | - | 0.2065 | - | 589th |
| ISPS Handa World Super 6 Perth | ANZ,ASA,EUR | 6 | 2018 | MC | - | 0.1739 | - | 564th |
| Joburg Open | AFR,ASA,EUR | 49 | 2017 | MC | - | 0.0761 | - | 522nd |
| Australian PGA Championship | ANZ,EUR | 48 | 2017 | MC | - | 0.0652 | - | 469th |