Quote Originally Posted by Downinthebend View Post
I couldn't find hornfan's quote, but I am 90% sure that that particular situation is illegal, the Offense would get slapped with an illegal proceeding foul, because if the offense subsitutes the defense must have the right to. (I remember hearing this in an Oregon game)
You are correct. The offense must give the defense time to substitute if they do so. One of the officials will stand over the ball until the defense has had sufficient time to substitute.

Though that doesn't always happen quite the way it should (see LSU/Tennessee).