My perspective as a coach where numbers can be an issue is this is based on quarters more than lack of compete from one team or another. We have been in games where some of our JV guys get half a game in, leaving them with just two quarters for the JV game. If the clock is running, then it could, in some cases, save the quarters for those kids. I have coached JV many times over the years, and keeping track of quarters can become a pain; especially if a key player has to sit the 4th quarter.