The Facts: 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.

Diehards Line: 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." The Colts were still awaiting an official diagnosis on Richardson's shoulder Monday morning, a team source told ESPN's Stephen Holder. Richardson was injured in Sunday's 23-16 victory over the Titans when he got tackled on a 4-yard run with 4:39 left in the second quarter. His right shoulder took the brunt of the impact as he fell to the turf, and he immediately reacted by pointing to the shoulder as he lay on the ground. Richardson did not return to the game and was replaced by Gardner Minshew, who completed 11 of 14 passes for 155 yards and helped the Colts (3-2) hold on for the victory.