Sam Choi of (South Korea) Anaheim, California, 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 Hana Financial Group Se Ri Pak Junior Championship in 2018. He also had top finishes at the 2017 IMG Academy Junior World Championship. Choi is verbally committed to the University of New Mexico and is currently No. 38 in the Rolex AJGA Rankings.
| Rank | Event | R1 | R2 | R3 | R4 | Total |
| 41 | Thunderbird International Junior | 75 | 73 | 79 | 227 | |
| 1 | Hana Financial Group Se Ri Pak Junior Championship | 66 | 70 | 69 | 205 | |
| T26 | PING Heather Farr Classic | 73 | 76 | 70 | 219 | |
| T19 | The PING Invitational | 76 | 76 | 73 | 225 | |
| T70 | 2017 Junior PGA Championship - Boys | 78 | 71 | 149 | ||
| 2 | 2017 IMG Academy Junior World Championship | 74 | 67 | 68 | 72 | 281 |