I think the broken wrist really messed him big time. From his shooting touch, to missing all those games with the injury and then with the suspension.
The thing about his defense is that he needs to read his teammates, play with them, see what their tendencies are and then react accordingly - filling in where he is needed.
The other problem is that isiah didn't know balkman would be such a defensive menace and spark off the bench in his rookie season - which really had jefferies on a short chain.
He's a decent player, but with balkman offering a similar type player with more upside....it doesn't look too good for him here in NY.