Brooke Seay of Rancho Santa Fe, California, is playing in her second Wyndham Cup. She qualified into the event for the West Team after a string of impressive finishes. She had top finishes at the 2018 Thunderbird International Junior and the 2017 U.S. Girls' Junior Championship. Seay is verbally committed to Stanford and is currently No. 13 in the Rolex AJGA Rankings.
| Rank | Event | R1 | R2 | R3 | R4 | Total |
| 27 | Rolex Girls Junior Championship | 70 | 74 | 79 | 80 | 303 |
| T2 | Thunderbird International Junior | 74 | 69 | 69 | 212 | |
| T17 | 2017 U.S. Girls' Junior Championship | 77 | 72 | 149 | ||
| T30 | 2017 Junior PGA Championship - Girls | 73 | 71 | 72 | 72 | 288 |