The Sharks say they won't re-sign veterans Scott Nichol, Jamal Mayers and Niclas Wallin, according to an ESPN.com report. GM Doug Wilson said as much Monday, adding that the team will also replace top assistant coach Trent Yawney, who left to pursue a head-coaching job in the AHL. Nichol, Mayers and Wallin will become unrestricted free agents on July 1.