Kyle Shanahan confirmed Joshua Dobbs will start in place of Brock Purdy in the San Francisco 49ers' Week 18 game against the Arizona Cardinals.
With the NFC West title already clinched, the Rams will start Jimmy Garoppolo at quarterback against the Seattle Seahawks on Sunday.
Richardson said a MRI revealed "a disc thing" that "might be chronic."
Running back Aaron Jones was not a full participant in Vikings practice Wednesday, but he's not concerned about his availability for Sunday night's showdown with the Lions.
MIN
DET