The Devils confirmed the signing of Zidlicky on Wednesday without releasing details of his new contract.
The signing will allow the Devils to keep their top defensive pair together. Zidlicky usually plays with captain Bryce Salvador.
Acquired from Minnesota in February 2012, Zidlicky helped the Devils reach the Stanley Cup finals that season. The native of the Czech Republic had four goals and 15 assists last season when New Jersey failed to make the post-season.
I don't think it's really truly going to sink in until we drop the puck, to be honest. I know there's going to be a lot of smoke and mirrors with the media attention and all that. We came [Monday] and it was sort of a light day to get things organized. We just want to focus in on the business aspect, the game itself. That's what we're preparing to do. Get these next couple of days out of the way and it's game on.
— Lightning captain Steven Stamkos on playing in his first Stanley Cup Final