| ITF USA F18 | 06/14 16:50 | 25 | Callahan, Hunter v Gozun, Alexandru | 6-1,7-6 | |
| ITF Mexico F4 | 05/18 20:40 | 26 | Callahan, Hunter v 판타 헤레로스, 조르지 브리안 | 4-6,7-6,6-7 | |
| ITF Mexico F4 | 05/16 16:00 | 25 | 엔다라, 이반 v Callahan, Hunter | Retired | |
| ITF Mexico F4 | 05/15 16:00 | 62 | Callahan, Hunter v 사마, 니콜라스 | 6-2,3-6,6-3 | |
| ITF Mexico F4 | 05/14 18:00 | 62 | Callahan, Hunter v Nureev, Ramazan | 6-1,6-3 | |
| ITF Mexico F3 | 05/10 20:50 | 26 | Hank, Tigre v Callahan, Hunter | 5-7,6-4,6-3 | |
| ITF Mexico F3 | 05/09 18:30 | 25 | 에차수, 마우리시오 v Callahan, Hunter | 4-6,1-6 | |
| ITF Mexico F3 | 05/08 14:30 | 62 | Callahan, Hunter v Rodriguez, J. A. | 6-2,6-2 | |
| ITF Mexico F2 | 05/04 23:00 | 26 | Callahan, Hunter v 엔다라, 이반 | 4-6,2-6 | |
| ITF Mexico F2 | 05/02 19:05 | 25 | Callahan, Hunter v Lamble, John | 2-6,6-4,6-3 | |
| ITF Mexico F2 | 05/01 15:00 | 62 | Callahan, Hunter v Spiering, Marvin Bernardo Becker | 6-2,6-1 | |
| ITF Mexico F2 | 04/30 15:00 | 62 | Callahan, Hunter v 맥브리드, 매트 | 6-2,6-2 | |
| Sarasota, USA, Qualifying | 04/15 14:00 | 45 | Callahan, Hunter v 소르기, 조아오 페드로 | 6-7,4-6 | |
| ITF Greece F5 | 04/06 07:35 | 26 | Callahan, Hunter v 본지, 벤자민 | 4-6,6-4,3-6 | |
| ITF Greece F5 | 04/05 06:30 | 25 | Zgombic, Fran Zvonimir v Callahan, Hunter | 3-6,1-6 | |
| ITF Greece F4 | 04/01 06:30 | 27 | 함펠, 레니 v Callahan, Hunter | 6-3,7-5 | |
| ITF Greece F4 | 03/31 10:25 | 26 | 카피리스, 스타마티스 v Callahan, Hunter | 2-6,1-6 | |
| ITF Greece F4 | 03/28 10:30 | 25 | Callahan, Hunter v 이스마일로브, 테무르 | 6-2,3-6,7-6 | |
| ITF Greece F3 | 03/21 10:00 | 25 | Callahan, Hunter v Zhyrmont, Dzmitry | 3-6,7-6,3-6 | |
| ITF Greece F3 | 03/20 10:00 | 62 | Callahan, Hunter v 스테르지오, 이오아니스 | 6-7,6-4,6-1 | |
| ITF Greece F3 | 03/19 08:00 | 62 | Callahan, Hunter v Oljaca, Mark | 6-0,6-0 | |
| ITF Greece F2 Qual | 03/14 11:00 | 62 | Callahan, Hunter v 베아우그, 맥센스 | 5-7,7-5,6-7 | |
| ITF Greece F2 Qual | 03/11 07:00 | 62 | Callahan, Hunter v Landa, Maxim | 6-4,6-4 | |
| ITF USA F9 | 03/01 15:00 | 25 | 라마나단, 람쿠마르 v Callahan, Hunter | 6-1,6-2 | |
| ITF USA F9 | 02/27 16:00 | 60 | Filip Cristian Jianu v Callahan, Hunter | 0-6,2-6 | |
| ITF USA F9 | 02/26 16:00 | 60 | Vale, Duarte v Callahan, Hunter | 4-6,4-6 | |
| ITF USA F9 | 02/24 14:00 | 60 | 정, 이리 v Callahan, Hunter | 2-6,2-6 | |
| ITF USA F8 | 02/23 15:00 | 25 | Kypson, Patrick v Callahan, Hunter | 3-6,6-4,6-2 | |
| ITF USA F8 | 02/20 18:00 | 60 | Callahan, Hunter v Zayid, Mubarak Shannan | 6-4,6-4 | |
| ITF USA F8 | 02/18 17:30 | 60 | Callahan, Hunter v 스트로드, 이사이아 | 6-4,6-2 |