Williams was elevated from the practice squad to the active roster last week after an injury sidelined Andre Ellington. Ellington remains out, leaving the Cardinals with three running backs - Chris Johnson, rookie David Johnson and Stephan Taylor.
Arizona signed running back Mike Gillislee to the practice squad. Gillislee played in three games for Miami as a rookie two years ago but missed all of last season due to injury. He was released by the Dolphins in their final roster cuts on Sept. 5.
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