Lee is a first-time Rolex Junior All-American and finished the season at No. 6 in the Polo Golf Rankings. The Saddlebrook High School junior recorded four top-10 finishes in 2015, including T10 at the Rolex Tournament of Champions and second at the FJ Invitational. Lee also advanced to the semifinals at the U.S. Junior Amateur Championship and represented the East Team at Wyndham Cup.
| Rank | Event | R1 | R2 | R3 | R4 | Total |
| T16 | 2015 The Junior PLAYERS Championship presented by TaylorMade-adidas Golf | 72 | 74 | 74 | 220 | |
| T3 | 2015 U.S. Junior Amateur Championship | 68 | 75 | 143 | ||
| T10 | 2015 Rolex Tournament of Champions | 72 | 73 | 73 | 70 | 288 |
| 2 | 2015 FJ Invitational | 66 | 74 | 71 | 67 | 278 |
| T20 | 2015 Thunderbird International Junior | 69 | 81 | 69 | 219 | |
| T14 | 2015 Junior Invitational at Sage Valley Golf Club | 71 | 75 | 77 | 223 | |
| T4 | 2015 TaylorMade-adidas Golf Junior at Innisbrook hosted by Justin Rose | 72 | 74 | 74 | 220 | |
| T20 | 2015 CB&I Boys Championship at Carlton Woods | 72 | 70 | 83 | 225 | |
| T2 | 2015 Puerto Rico Junior Open presented by EaglesDream Golf Academy | 71 | 68 | 70 | 209 | |
| T17 | 2014 Polo Golf Junior Classic | 69 | 74 | 143 |