Colts head coach Shane Steichen said Rivers will draw another start during Monday Night Football against the 49ers in Week 16 on Dec. 22, James Boyd of The Athletic reports.
Richardson (orbital) has been cleared to resume football activities, but it remains uncertain whether he will return for Indianapolis' final three games of the regular season, Mike Chappell of Fox 59 News Indianapolis reports.
Rivers completed 18 of 27 pass attempts for 120 yards, one touchdown and one interception while losing five yards on his only carry in Sunday's 18-16 loss to the Seahawks.
Rivers will start for the Colts against the Seahawks on Sunday, Ian Rapoport of NFL Network reports. He will be activated from the practice squad ahead of Saturday's game, Adam Schefter of ESPN reports.