I never knew about that deadline before
Also, the deadline to trade him has passed – it was August 9. So whether he’s part of the roster or not, they’ll have his rights.
According to Pro Football Talk, if Bosa doesn’t sign before the Tuesday after Week 10, he can’t play in 2016. If he doesn’t sign at all in 2016, he’ll be eligible for the 2017 NFL Draft. Pretty crazy.
http://collegespun.com/big-ten/ohio-state/what-happens-if-joey-bosa-doesnt-sign