Notre Dame's starting running back Jafar Armstrong is expected to miss "extended time" after suffering a groin injury during the team's opener against Louisville on Monday, The Athletic's Pete Sampson reported on Wednesday.
According to Sampson, Armstrong could miss up to two months, with a five-week absence being the optimistic timeline.
Armstrong left the Louisville game early in the first quarter after tallying just two carries for 10 yards. Coach Brian Kelly said Tuesday afternoon that Armstrong would be getting an MRI later that day to determine the severity of the injury.
"Felt some discomfort in the groin, ab area," Kelly said on Tuesday.