Not sure exactly how this works, but does this make Isaiah eligible for Designated Player Veteran Extension when his contract is up or does he need to make All NBA in the summer leading up to his contract being renewed?
No, he has a) not been in the league long enough, nor b) has not been on the Celtics long enough. He'd need to have been in the league at least 8 years (he's in year six), and with the Celtics for the prior 5.
Great, thanks, I wasn't sure how this worked.