The Colts placed Willis (illness) on the reserve/COVID-19 list Saturday.
Per Aaron Wilson of Sportstalk 790 Houston, all 18 players that landed on the COVID-19 list Saturday tested positive for the virus. Willis thus will sit out Saturday's game in Arizona and also may be in danger sitting out Week 17 versus the Raiders. With Andrew Sendejo (concussion) also sidelined, the Colts will be down to Jahleel Addae, George Odum and practice squad call-up Will Redmond at safety Saturday.