Round: 62 Ground: Clay
| ITF Mexico F5 | 2015/05/30 15:00 | Kandath, Matthew v Kaster, Kaptan | 6-4,4-6,6-4 |
| ITF USA F11 Qual | 2015/03/21 16:00 | Kaster, Kaptan v Nathan Ponwith | 5-7,1-6 |
| ITF USA F10 Qual | 2015/03/14 16:00 | Kaster, Kaptan v Ore, I. A. | 2-6,2-6 |
| ITF USA F9 Qual | 2015/02/21 19:00 | Ryotaro Matsumura v Kaster, Kaptan | 6-2,6-0 |
| ITF USA F8 Qual | 2015/02/14 17:30 | Kaster, Kaptan v Silverman, Cameron | 2-6,2-6 |
| ITF USA F7 Qual | 2015/02/06 14:30 | Kaster, Kaptan v Dettinger, Moritz | 2-6,2-6 |
| ITF USA F6 | 2015/01/24 17:00 | Kaster, Kaptan v Silverman, Cameron | 3-6,3-6 |
| ITF USA F6 | 2015/01/23 16:30 | Kaster, Kaptan v Borkowski, Mikolaj | 4-6,6-3,6-1 |
| USA F26, Singles Qualifying | 2014/09/20 16:00 | Goles Babic, Marko v Smith, Errol | 6-2,6-4 |