I work for the NBA and I have a question

[ChuckElias]

Buck, there are two situations that I can think of.

1) Rebound, then ball is knocked OOB but officials do not know who touched it last. Rebounder had control, so gets credit for the rebound, but since the officials don't know who touched last before going OOB, they are required to jump it up.

2) Rebound, then the rebounder is immediately tied up for a jump ball. The rebounder had control, so gets credit for the rebound. But then the immediate tie-up causes a jump.

In each case, the sub would be allowed to come in on the whistle. So you'd have rebound, sub, jump.

Hope that helps a little.