William Moll of Houston, Texas, is playing in his first Wyndham Cup. He qualified into the event for the West Team after a string of impressive finishes. He won the 2017 Jones Cup Junior Invitational. He also had a top finish at The PING Invitational in 2017. Moll is verbally committed to Vanderbilt University and is currently No. 21 in the Rolex AJGA Rankings.
| Rank | Event | R1 | R2 | R3 | R4 | Total |
| T36 | Thunderbird International Junior | 79 | 72 | 73 | 224 | |
| T43 | AJGA Simplify Boys Championship at Carlton Woods | 73 | 71 | 80 | 224 | |
| 1 | 2017 Jones Cup Junior Invitational | 73 | 63 | 68 | 204 | |
| 29 | Rolex Tournament of Champions | 80 | 72 | 67 | 75 | 294 |
| T7 | The PING Invitational | 76 | 74 | 70 | 220 | |
| T68 | The Junior PLAYERS Championship presented by TaylorMade-adidas Golf | 74 | 83 | 76 | 233 | |
| T65 | 2017 Junior PGA Championship - Boys | 73 | 75 | 75 | 76 | 299 |
| T24 | Polo Golf Junior Classic | 76 | 70 | 74 | 76 | 296 |