[Mark T. DeNucci, Sr.]

The OhioHSAA uses a quarter rule in basketball. A high school player (freshmen, sophomore, junior, senior) is allowed only 80 quarters of play during the regular season with a maximum of five quarters per day (in a freshmen/jr. varsity/varsity tripleheader a freshmen could play one quarter two quarters in the freshmen game, one quarter in the jr. varsity game, and two in the varsity game; a soph., jr., or sr. could play a total of five quarters between the jr. varsity and varsity games). While NFHS rules consider any overtime period to be an extension of the fourth quarter, the OhioHSAA also considers any overtime period of the varsity game to be an extension of a player's fifth quarter if the player has already played five quarters that day.

Having spewed out all of that gobbledy gook, I would have to say that by rule, that coach is going to have to burn a timeout if he wants to change players. But the real problem is that if the coach decides he does not want to burn a timeout and is willing to take the technical foul for using an ineligible player (and in Ohio the foul is a flagrant technical foul for playing six quarters and the player would be ejected from the game and disqualified for two more games) I have trouble knowingly letting an ineligible player enter the game.

Since quarter rules are uniquely a StateHSAA rule, I would think that each state is going to have to develope its own casebook plays for the situation being discussed in this thread.