| ITF Norway F1 | 10/19 12:10 | 26 | 에주포비치, 엘마르 v Callahan, Hunter | 5-7,3-6 | |
| ITF Norway F1 | 10/18 12:00 | 25 | Callahan, Hunter v 므리드하, 요나단 | 6-4,2-6,6-2 | |
| ITF USA F30 | 09/29 18:20 | 26 | 가란간가, 타카니 v Callahan, Hunter | 6-2,1-6,6-4 | |
| ITF USA F30 | 09/27 19:10 | 25 | Callahan, Hunter v 에주포비치, 엘마르 | 7-5,6-1 | |
| ITF USA F29 | 09/21 17:00 | 25 | Callahan, Hunter v 고메즈, 루카스 | 3-6,6-7 | |
| ITF USA F29 | 09/19 18:30 | 60 | Callahan, Hunter v Johnson, Hunter | 6-3,6-1 | |
| ITF USA F29 | 09/18 19:30 | 60 | Callahan, Hunter v 벤트레, 알레산드로-다미아노 | 6-4,6-3 | |
| ITF USA F29 | 09/17 00:30 | 60 | Callahan, Hunter v 스미스, 에롤 | 6-3,7-5 | |
| ITF USA F28 | 09/13 21:45 | 25 | Callahan, Hunter v Trombetta, Ty | 2-6,4-6 | |
| ITF USA F27 | 08/09 14:00 | 25 | 폴만스, 마르크 v Callahan, Hunter | 6-3,6-3 | |
| ITF USA F27 Qual | 08/07 13:30 | 62 | Callahan, Hunter v Ellefsen, Nils | 6-3,6-2 | |
| ITF USA F26 | 08/03 15:00 | 25 | 킹, 에반 v Callahan, Hunter | 6-3,7-5 | |
| USA F26, Singles Qualifying | 08/01 16:50 | 62 | Callahan, Hunter v 코르윈, 펠릭스 | 7-5,7-6 | |
| USA F26, Singles Qualifying | 07/31 16:30 | 62 | Callahan, Hunter v 므비디, 뭰드와 | 6-2,6-1 | |
| USA F26, Singles Qualifying | 07/30 17:00 | 62 | Callahan, Hunter v Frljanic, Stefan | Retired | |
| ITF USA F22 | 06/28 14:00 | 25 | Callahan, Hunter v 키아트코우스키, 다이손 | 4-6,1-6 | |
| ITF USA F20 | 06/23 21:15 | 26 | 파사, 나단 v Callahan, Hunter | 6-3,7-6 | |
| ITF USA F20 | 06/22 19:30 | 25 | Carter, Andrew v Callahan, Hunter | 2-6,1-6 | |
| ITF USA F19 | 06/16 17:35 | 26 | Gosea, Farris Fathi v Callahan, Hunter | 7-6,7-5 | |
| ITF USA F19 | 06/14 16:35 | 25 | Callahan, Hunter v Garza, Daniel | 7-5,6-4 | |
| ITF Italy F11 | 05/18 10:40 | 25 | Callahan, Hunter v Carli, Cristian | 4-6,6-3,5-7 | |
| Italy F11, Singles Qualifying | 05/16 14:35 | 44 | Callahan, Hunter v 토마세토, 루카 | 6-2,3-6,6-3 | |
| Italy F11, Singles Qualifying | 05/16 09:45 | 44 | Callahan, Hunter v Cortegiani, Alessandro | 6-4,6-0 | |
| Challenger Rome Qual | 04/30 11:35 | 46 | 푸크소빅스, 마르톤 v Callahan, Hunter | 6-1,6-3 | |
| Challenger Rome Qual | 04/30 09:00 | 45 | Camilli, Lorenzo v Callahan, Hunter | 0-6,0-6 | |
| ITF Greece F6 | 04/27 07:00 | 25 | 아디슨, 아론 v Callahan, Hunter | 6-4,7-6 | |
| ITF Greece F6 | 04/25 09:15 | 62 | Callahan, Hunter v 크라이니크, 파벨 | 3-6,7-5,6-3 | |
| ITF Greece F5 | 04/21 10:15 | 26 | Callahan, Hunter v 글라스풀, 로이드 | 6-7,2-6 | |
| ITF Greece F5 | 04/20 10:10 | 25 | Callahan, Hunter v 사르미엔토, 라이몬드 | 4-6,7-6,7-5 | |
| ITF Greece F5 | 04/18 08:40 | 62 | 베란, 마르틴 v Callahan, Hunter | 6-3,3-6,6-7 |