Hightower, a former Arizona Cardinals running back, had been trying to resurrect his career with New Orleans after missing three seasons because of complications from a serious knee injury. He survived all preseason cuts, only to be cut on the eve of New Orleans' regular season opener at Arizona.
Seantavius Jones and Opurum have been with the Saints since last season.
Don Jones has spent parts of the past two seasons with Miami and New England.
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