Ehlinger will operate as Indianapolis' top backup to Garner Minshew beginning with Sunday's game against the Jaguars after Anthony Richardson (shoulder) was placed on injured reserve Wednesday, Stephen Holder of ESPN.com reports.
Ehlinger has been inactive for four of the Colts' first five games, with the lone time he's dressed coming in Week 3 at Baltimore while Richardson was sidelined with a concussion. After suffering an AC joint sprain to his throwing shoulder in the Week 5 win over the Titans, Richardson is projected to miss 4-to-8 weeks, setting Ehlinger up for an extended run as the No. 2 quarterback. The Colts also signed Kellen Mond to their practice squad Wednesday to provide the organization with further depth at quarterback.