Martin just appeared on "Undisputed" on FS1 to address the incendiary comments his former coach wrote about him in his new book ... and Kenyon didn't hold back.
"You're taking a shot at the way she raised me ... and other single mothers out there. You're taking a shot at them."
"My mother was my mother and my father. So for you to say that ... you disrespecting her."
George Karl has yet to respond.