He was inactive for two games ( Weeks 4 -- 5 ) due to a calf injury .
Shields and safety Morgan Burnett became the first rookie defensive back tandem to start for the Packers since the AFL and NFL merged .
Shields was inactive for two games ( Weeks 4 -- 5 ) due to a calf injury .
Shields and safety Morgan Burnett became the first rookie defensive back tandem to start for the Packers since the AFL and NFL merged .