• Usia - 33.

Hunter Callahan pertandingan terakhir

• Hunter Callahan - Alexander Sarkissian | 23 Nov 2017 | 0:2 Columbus
• Vidit Vaghela - Hunter Callahan | 21 Nov 2017 | 0:2 Columbus
• Sam Riffice - Hunter Callahan | 24 Jul 2017 | 2:0 ITF Champaign 2 Men
• Patrick Kypson - Hunter Callahan | 23 Feb 2017 | 2:1 ITF Indian Harbour Beach Men
• Ben Patael - Hunter Callahan | 02 Nov 2016 | 2:0 ITF Sheffield Men
• Robbie Ridout - Hunter Callahan | 01 Nov 2016 | 0:2 ITF Sheffield Men
• Hunter Callahan - Lucas Gomez | 21 Sep 2016 | 0:2 ITF Irvine Men
• Hunter Callahan - Junior Alexander Ore | 17 Feb 2016 | 1:2 Plantation 2