 On NHL trade deadline day, Sulzer was dealt to the Buffalo Sabres, along with forward Cody Hodgson, in exchange for defenseman Marc-Andre Gragnani and forward Zack Kassian.On May 21, 2012, the Buffalo Sabres re-signed Sulzer to a one-year contract extension worth $725,000.In explaining the extension to media gathered at First Niagara Center, GM Darcy Regier said, "(Sulzer) played very well with Christian (Ehrhoff).