Sabres re-sign D Gragnani to 1-year contractSource: AP ‘Gragnani will have a tough test cracking the NHL this year after Buffalo upgraded its defense by adding veterans Robyn Regehr and Christian Ehrhoff.’ Related posts: Sabres sign Christian Ehrhoff to a long-term contract Sabres re-sign D Gragnani to 1-year contract Sabres re-sign RW Hamel to two-year contract Sabres acquire rights to Ehrhoff from Isles; Agent talks to WGR Sabres sign Biron to two-year contract