| Challenger Columbus | 09/18 20:45 | 25 | [204] Adam Walton v Giovanni Mpetshi Perricard [221] | 7-5,6-4 | |
| Challenger Cary | 09/14 23:00 | 26 | [203] Adam Walton v Patrick Kypson [271] | 5-7,3-6 | |
| Challenger Cary | 09/13 16:00 | 25 | [203] Adam Walton v Mitchell Krueger [263] | 7-5,6-2 | |
| ATP Winston-Salem | 08/19 16:25 | 14 | [206] Adam Walton v Strong Kirchheimer [427] | 5-7,3-6 | |
| Challenger Stanford | 08/16 18:25 | 26 | [120] James Duckworth v Adam Walton [206] | 6-3,6-4 | |
| Challenger Stanford | 08/15 17:00 | 25 | [232] Zachary Svajda v Adam Walton [206] | 2-6,2-6 | |
| Challenger Cary | 08/13 18:00 | 29 | [149] Nicolas Moreno De Alboran v Adam Walton [256] | 4-6,6-3,5-7 | |
| Challenger Cary | 08/12 19:00 | 28 | [123] Liam Broady v Adam Walton [256] | 4-6,5-7 | |
| Challenger Cary | 08/11 19:30 | 27 | [256] Adam Walton v Rinky Hijikata [118] | 6-2,6-4 | |
| Challenger Cary | 08/09 18:00 | 26 | [333] Billy Harris v Adam Walton [256] | 6-3,6-7,6-7 | |
| Challenger Cary | 08/07 20:25 | 25 | [260] Beibit Zhukayev v Adam Walton [256] | 4-6,3-6 | |
| Challenger Lexington | 08/02 14:00 | 26 | [249] Adam Walton v Ulises Blanch [422] | 3-6,3-6 | |
| Challenger Lexington | 07/31 21:40 | 25 | [249] Adam Walton v Maxime Janvier [331] | 4-6,6-3,6-3 | |
| Challenger Salinas | 07/25 15:00 | 25 | [275] Omar Jasika v Adam Walton [247] | 6-4,6-2 | |
| Challenger Granby | 07/19 20:40 | 26 | [332] Maxime Janvier v Adam Walton [244] | 6-4,4-6,7-6 | |
| Challenger Granby | 07/18 23:30 | 25 | [244] Adam Walton v Vasek Pospisil [161] | 6-7,7-6,6-1 | |
| Challenger Chicago | 07/13 20:20 | 26 | [237] Adam Walton v Giovanni M Perricard [218] | 6-7,4-6 | |
| Challenger Chicago | 07/10 22:00 | 25 | Eliot Spizzirri v Adam Walton | 2-6,2-6 | |
| Challenger Bloomfield Hills | 07/04 20:50 | 25 | Kei Nishikori v Adam Walton | 6-1,6-2 | |
| ITF M25 Tulsa | 06/25 14:00 | 29 | [245] Adam Walton v Nick Chappell [354] | 6-1,6-3 | |
| ITF M25 Tulsa | 06/24 13:55 | 28 | [245] Adam Walton v Aidan Mchugh [382] | 6-1,6-3 | |
| ITF M25 Tulsa | 06/23 13:55 | 27 | [245] Adam Walton v Ethan Quinn [395] | 6-2,7-6 | |
| ITF M25 Tulsa | 06/22 17:40 | 26 | Adam Walton v Murphy Cassone | 4-6,6-1,6-4 | |
| ITF M25 Tulsa | 06/20 16:00 | 25 | Adam Walton v Gianni Ross | 6-0,6-1 | |
| Challenger Palmas del Mar | 06/17 01:25 | 27 | Kei Nishikori v Adam Walton | 6-4,6-2 | |
| Challenger Palmas del Mar | 06/15 17:40 | 26 | [464] Rubin Statham v Adam Walton [254] | 2-6,0-6 | |
| Challenger Palmas del Mar | 06/13 15:00 | 25 | [254] Adam Walton v Marc Polmans [179] | 7-6,6-1 | |
| Challenger Tyler | 06/06 19:55 | 25 | [288] Adam Walton v Tennys Sandgren [246] | 6-4,3-6,6-7 | |
| Challenger Tyler | 06/05 18:30 | 19 | [288] Adam Walton v Mukund Sasikumar [383] | 6-4,6-3 | |
| Challenger Tyler | 06/04 22:35 | 14 | Adam Walton v Harrison Adams | 6-3,6-3 |