Well, you gave an example of an obvious racial attack/stereotype, what about one that isn't obvious?
As presented, sure.
The whole argument comes down to perception honestly. You've got some who automatically put any criticism of a black QB in the 'racist' category. Me? I just prefer to look at the individual QB. I'm not looking for racism under every rock.
Do I miss cases of actual racism? Probably, but I'm willing to bet the people on the more frequent event is those on the other side of the argument seeing it where it doesn't exist.
If the statement isn't obvious and you've gotta read the bias into it, there's a pretty good chance the bias isn't in them. It's in you.