The Indianapolis Colts signed quarterback Josh Johnson on Friday after starter Andrew Luck saw limited practice time with an injury to his throwing shoulder.
Luck was officially listed as questionable on the Colts' injury report Thursday for Sunday's game against the Jacksonville Jaguars. During Thursday's practice, Luck took snaps but did not make a throw during the portion of the workout open to the media. Backups Matt Hasselbeck and Alex Tanney filled in for him.