The surgery thing may explain why he came so cheap, relatively to other similar defencemen like Edmundson and Lyubushkin. But I'm still pretty skeptical of the "may never play again" claims, especially coming from just Simmons right now. In the playoffs he had resumed skating and was practicing with Dallas for a little bit, he just wasn't fully cleared to return prior to their elimination. Who know is he would have been or not, but the language that was being used about him at the time certainly didn't seem like he would never be playing again.