Colts rookie quarterback Anthony Richardson is seeking a second opinion on his injured throwing shoulder and is expected to miss Indianapolis' Week 6 game against the Jaguars, a source told ESPN's Jeremy Fowler.
The initial belief was that Richardson suffered a Grade 3 sprain to the AC joint in his right shoulder, sources told ESPN on Sunday, but Richardson and the Colts are still gathering information on the injury. He is expected to undergo an MRI and will receive a second opinion from shoulder specialist Dr. Keith Meister, according to sources.
Richardson's timetable beyond Indianapolis' coming game Sunday at Jacksonville is unclear, although a source told ESPN he could be sidelined "a while.