NFL Media Insider Ian Rapoport reported Thursday that Richardson underwent "just a scope" on his shoulder, according to a person informed of the running back's condition.
The injury shouldn't hurt Richardson's offseason, according to the source.
Richardson struggled in 14 games with the Colts, showing tentativeness and an inability to create creases at the line. He ended the season with 458 yards on 157 carries (2.9 yard average) and three touchdowns wearing the horseshoe helmet. He lost his starting gig to Donald Brown during the Colts' stretch run.
The 22-year-old back had injury concerns entering the NFL out of Alabama. He had arthroscopic surgery to remove cartilage in his left knee prior to his rookie season. He also suffered ankle injuries in both of his NFL seasons, but he has played through his injuries.