The Stars put Krys Barch on injured reserve Saturday because of a scratched cornea and fractured orbital bone sustained in a fight on Feb. 3 at Boston.
He's joined by right winger Adam Burish, who hurt his face that night in a fight-marred game. Dallas also assigned Francis Wathier to the Texas Stars in the AHL.
Williams' contract is for $500,000 in the NHL and $105,000 in the minors. He could play for the Stars on Sunday against Columbus.