Who does Don blame as he begins to pity himself because his own poor playresults in his getting fewer opportunities to carry the ball at running back?

Don's game falters during the game in which the Panthers play El Paso Austin. Coach Gaines replaces him with Chris Comer at fullback, and Chris' game is flawless. Rather than compliment Comer on his game, Don gives into humiliation and anger, lamenting how a ‘nigger’ like Comer is favored at Permian.