Also the Pens would have to give up more. Zucker is a cap dump at this point.
Eberle is not exactly good and has only more year at the same cap hit. The "pay" of moving Zucker in this deal is taking back an extra year of $5.5M hit for a guy that isn't really a better overall player, he just scores a little more. Eberle for Zucker is not a win for Pittsburgh on the ice or in terms of contract.