Arroyo (knee) did not practice Wednesday, Corbin K. Smith of SI.com reports.
Arroyo suffered the knee injury in Sunday's blowout win over Atlanta, and head coach Mike McDonald has since expressed skepticism that Arroyo would be able to play in Week 15 against the Colts. His inability to suit up at all Wednesday isn't a promising start, but he'll have two additional days to increase his participation.