Johnson (ankle) was seen wearing a walking boot and using crutches following Sunday's game against the Browns, Nate Atkins of The Indianapolis Star reports.
Johnson saw his most action of the season before suffering the injury. He logged 31 plays (43 percent) to go along with seven (23 percent) on special teams. It remains to be seen what his recovery timeline looks like or if he will be forced to miss any games. Adetomiwa Adebawore would be in line for increased snaps as a depth option on the Colts' interior defensive line if Johnson is indeed sidelined.