Simon signed a futures contract with the Redskins on Monday, ESPN's Field Yates reports.
Simon began the 2016 season as a member of the Seahawks, but was waived prior to Week 2 only to be claimed by the Cardinals shortly thereafter. However, he ultimately finished out the season in Arizona having logged just six tackles across 76 snaps on defense and will now set his aims to fight for a reserve role in Washington during the offseason.
Simon was released by Arizona on Monday, Darren Urban of the Cardinals' official site reports.
Simon played in nine games for Arizona but saw just 76 defensive snaps on the season, recording six tackles. He was cut to clear a roster spot for cornerback Harlan Miller.
Simon was unable to suit up for Sunday's loss to the Dolphins, but the ankle issue doesn't appear to have lingered for much longer. He could be in line for an expanded role if fellow cornerback Marcus Cooper (back) is unable to play.