| Challenger Columbus 3 | 2019/09/16 17:35 | Robert Cash v Strong Kirchheimer | 3-6,4-6 |
| ITF - Pittsburgh M15 | 2019/07/03 17:35 | Quinn Vandecasteele v Robert Cash | 6-7,7-5,6-1 |
| ITF - Pittsburgh M15 | 2019/07/02 14:00 | Robert Cash v Jonathan Sorbo | 6-4,4-6,10-7 |
| ITF - Pittsburgh M15 | 2019/07/01 14:00 | Jorge Montero v Robert Cash | 3-6,1-6 |
| ITF USA F33 | 2018/11/17 15:00 | Boris Butulija v Robert Cash | 7-5,6-1 |
| ITF USA F18 | 2018/06/25 14:00 | Robert Cash v Catalin Fifea | 3-6,4-6 |
| ITF USA F38 | 2017/11/18 15:00 | Alexander Brown v Robert Cash | 3-6,6-2,6-1 |
| ITF - Austin M15 | 2019/11/20 19:20 | Colin Markes v Tyler Zink | 6-7,6-7 |
| ITF - Austin M15 | 2019/11/19 16:00 | Colin Markes v Eric Morris | 6-3,6-3 |
| ITF - Austin M15 | 2019/11/18 16:00 | Colin Markes v Eduardo N Irizarry | 6-4,6-1 |
| ITF M25 Fort Worth | 2019/10/21 15:00 | Colin Markes v Alfredo Perez | 4-6,0-6 |
| ITF M25 Fort Worth | 2019/10/20 15:00 | Kyle Overmyer v Colin Markes | 1-6,0-6 |
| ITF M25 Norman | 2019/09/30 15:00 | Alexander Cozbinov v Colin Markes | 7-5,7-5 |
| ITF M25 Norman | 2019/09/29 15:00 | Colin Markes v Hunter Heck | 7-6,6-4 |
| ITF M25 Chiswick | 2019/08/05 10:55 | Brandon Murphy v Colin Markes | 6-4,6-2 |