Linebacker Shawne Merriman is also expected to miss at least another week of practice with a strained right Achilles tendon. Coach Chan Gailey provided the update Monday, a day after the Bills won their first game by beating Detroit 14-12.
Walking with a slight limp, Spiller says he was hurt when planting his foot to brace himself as he was pushed out of bounds after a 29-yard punt return. Johnson was hurt in the second half.
Merriman was hurt in his first practice with the team Wednesday, a week after being claimed off waivers from San Diego.