I never knew about this, but you are totally right, if what I read on google is accurate. I had little respect for Dungy before, and I have been unburdened of the rest.
This was all complete speculation to be fair though. But yeah, he has a holier than though attitude, and it was said he shunned his son because of his sexual orientation. His stance on anti-gay marriage and groups hes endorsed is highly publicized. That's his right to believe in that, but to do that to your son is pretty despicable.