Richardson was taken to the locker room early in the second quarter to be evaluated and the team later announced that he was out with a concussion.
Richardson ran for two touchdowns in the first quarter to help the Colts build a 14-7 lead. He went to the medical tent after a drive to start the second quarter and was soon escorted to the locker room.
It was unclear when he was injured, but he left after a series where he didn't appear to take any big hits.
Richardson, the fourth overall pick in the draft, was 6 of 10 for 56 yards passing. His touchdown runs were for 18 and 15 yards.
He was replaced by Gardner Minshew.
AP NFL: https://apnews.com/hub/nfl
The Associated Press