By WI AREA BUCKEYE on 13:16:28 04/21/17
calls if JTB has to exit for a short time (equipment) or for a longer time (rest of the game).
On top of that, if he is out for an upcoming game, the #2 may change as they have the week to prepare. It may even be dependent on the opponent.
If JTB twists a knee and is out for 3 weeks, I think they both play initially and then a decision is made based on performance.