Cal Gundy resigned from Oklahoma late Sunday night, and the long-time assistant and former player explained that he said a word that was shameful and hurtful, no matter his intentions.

After coach Brent Venables released a statement Sunday night accepting the resignation, he put out another statement on Monday. He said the pain of the resignation does not touch the experience of pain felt by the players, and then addressed the heart of the matter. Venables later said the resignation was the right thing to do to move forward in a positive way:

Coach Gundy resigned from the program because he knows what he did was wrong. He chose to read aloud to his players, not once but multiple times, a racially charged word that is objectionable to everyone… This is not acceptable. Period.”

The resignation as wide receivers coach was related to a film session with players when Gundy said he picked up and read from a player’s iPad.

Gundy, 50, is the younger brother of Oklahoma State head coach Mike Gundy, and played quarterback for the Sooners from 1990 to 1993. He set nearly every school record by the time he graduated.