| | Year | Tournament | Position |
|
First Name:
|
Jeff Y
|
|
Last Name:
|
Guan
|
|
Hometown:
|
Bexley
|
|
St/Prov:
|
NSW
|
|
Country:
|
AUS
|
|
Rank:
|
22
|
| 2023 | South Australia Am Classic | T2 |
| 2023 | TPS Hunter Valley (Australasia Tour) | T16 |
| 2023 | TPS Sydney (Australasia Tour) | 4th |
| 2023 | New South Wales Amateur (AUS) | 16's |
| 2023 | New South Wales Am - Stroke | T5 |
| 2023 | Avondale Medal (NSW, AUS) | Champion |
| 2023 | Australian Amateur | T9 |
| 2023 | Master of the Amateurs (VIC, AUS) | T9 |
| 2022 | Junior 6s Liverpool (NSW, AUS) | Champion |
| 2022 | Asia-Pacific Amateur | T3 |
| 2022 | WA Open (Australasia Tour) | 4th |
| 2022 | Western Australia PGA (Australasia Tour) | T9 |
| 2022 | Junior 6s World Final (VIC, AUS) | Champion |
| 2022 | AJGA Players (FL, USA) | Champion |
| 2022 | US Junior | Quarters |
| 2022 | US Junior - Stroke | T35 |
| 2022 | US Amateur Qualifying (3 spots) | 1st Alt |
| 2022 | Trans-Miss Amateur (USA) | T4 |
| 2022 | Western Australia Open (Australasia Tour) | T4 |
| 2022 | Aussie Boys Interstate (W/T/L) | 5/0/1 |
| 2022 | Australian Junior | Champion |
| 2022 | NSW Open (Australasia Tour) | T31 |
| 2022 | AJGA February Open (CA, USA) | Champion |
| 2022 | Master of the Amateurs (VIC, AUS) | T13 |
| 2022 | Harvey Norman Junior (NSW, AUS) | Champion |
| 2021 | New South Wales Junior (AUS) | Champion |
| 2021 | NSW Schools Selection (AUS) | Champion |
| 2021 | Australian Junior | Champion |