"having, reflecting, or fostering the belief that race (see RACE entry 1 sense 1a) is a fundamental determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race."
Saying what he said, in the context in which he said it, does not fit any aspect of this definition. Context matters here.
Can saying that be racist? Of course. It often is. But saying it doesn't automatically make one racist. It's silly to think that it does. It's dumb for him to say, and likely very insensitive, but that doesn't mean he is a racist.
Frankly, I'm surprised how many BYU fans fail or refuse to bring basic critical thinking skills to these kinds of circumstances just because he is a Ute.