Feaster has been waived by the Cardinals, Darren Urban of the team's official site reports.
Feaster was promoted to Arizona's 53-man roster prior to Week 11 and served as a reserve behind James Conner and Eno Benjamin. Ultimately, Feaster did not see any snaps in his reserve role. Assuming he clears waivers, the running back could be signed back to the team's practice squad.