Mikey... a rub is not a marinade! and even a rub better not be left on too long, or the tissue will break down and you'll end up with mush. It may be flavorful, but it will still be mush!
I understand a rub is not a marinade, this is why I did not suggest it. As long as it is cooked properly a rub will only help the flavor profile. I am just offering my 2 cents as much as the next guy...