I have a couple of questions regarding the clock run off in college and the NFL...
1) Can't the return team just call fair catch?? I think that would stop the clock as soon as he signals it. It would give them bad field position, wherever he caught it, but it would take forever to run the clock out, and you could keep backing them up. At the least you'd stop the returner from needlessly getting tackled every play.
2) In the NFL, I'm thinking about the run off when there's a procedure penalty. I'll set up the scenario Dallas has the ball late in the game against Arizona. It's close and AZ has all 3 timeouts, meaning they can stop the clock every play, if they can prevent Dallas from getting a first down. And Dallas would have to punt if they don't get the first down, running maybe 10 seconds off with 3 straight runs to waste their timeouts.
So my question is, can Dallas intentionally commit false starts or procedure penalties and run 10 seconds off the clock each time, essentially running the clock out, even though AZ has timeouts? I think that rule begins when the clock is under two minutes. You could conceivably take 12 penalties in a row, never run a play, but run the entire 2:00 off, if they allow that.
These artificial clock rules really bug me, and I think coaches can be "bush league" and take advantage of the quirks.