Honestly, the best that the Celtics might get from New Jersey is taking on the last two years on the contract of Johan Petro, an under-achieving foul-prone but athletic 7-footer who is 25 with $6.75 million left on his contract. He's bad enough that people talk about him as the Net's second-best amnesty candidate behind Travis Outlaw, but good enough to have Nets fans think he might have trade value.
I guess he's somewhat adequate for a back-up center, but Nets fans seem to consider him unnecessary behind Brook Lopez in the same way that some Celtics fans seem to think that a legitimate backup point guard is not necessary behind Rajon Rondo.
I haven't actually seem Petro play much, though.