The Packers activated Johnson (hamstring) off the active/non-football injury list Sunday, Wes Hodkiewicz of the Packers' official site reports.
Johnson made his return to practice Sunday after having missed the start of training camp due to a hamstring injury. The rookie undrafted free agent should now have ample opportunity to compete for a spot as one of Green Bay's backup running backs, as the team currently lacks proven talent at the position behind Josh Jacobs.