| | Year | Tournament | Position |
|
First Name:
|
Jackson
|
|
Last Name:
|
Koivun
|
|
Hometown:
|
Chapel Hill
|
|
St/Prov:
|
NC
|
|
Country:
|
USA
|
|
Rank:
|
65
|
| 2023 | Junior Invitational (GA, USA) | T6 |
| 2023 | Johnson World Junior (SC, USA) | Champion |
| 2023 | Jones Cup (GA, USA) | T6 |
| 2022 | South Beach International Am (FL, USA) | 3rd |
| 2022 | AJGA Rolex T of C (USA) | Champion |
| 2022 | AJGA Players (FL, USA) | 2nd |
| 2022 | US Amateur Qualifying (5 spots) | 2nd |
| 2022 | Wyndham Cup (W/T/L) | 3/0/1 |
| 2022 | North and South Amateur (NC, USA) | 16's |
| 2022 | North and South Am – Stroke (NC, USA) | T5 |
| 2022 | AJGA North Carolina Invitational (NC, USA) | 4th |
| 2022 | Junior Invitational (GA, USA) | T9 |
| 2022 | AJGA Feb Invitational (TX, USA) | T12 |
| 2021 | AJGA Rolex T of C (USA) | 2nd |
| 2021 | San Francisco City (CA, USA) | 32s |
| 2021 | San Francisco City – Stroke | T12 |
| 2021 | AJGA Players (FL, USA) | T19 |
| 2021 | AJGA August Invitational (USA) | Champion |
| 2021 | AJGA July Open 4 (CA, USA) | 4th |
| 2021 | US Junior – Stroke | T20 |
| 2021 | NCGA Junior (CA, USA) | Champion |
| 2021 | AJGA June Open 3 (CA, USA) | 2nd |
| 2021 | NorCal Junior Tour Summer 2 (USA) | 5th |
| 2021 | AJGA June Open (AZ, USA) | 2nd |
| 2021 | NorCal Junior Tour Spring 6 (USA) | T6 |
| 2021 | NorCal Junior Tour Spring 5 (USA) | T2 |
| 2021 | AJGA April Open (AZ, USA) | T9 |