Lions CB Saivion Smith in concussion protocol

Detroit Lions cornerback Saivion Smith is in the concussion protocol but tests on his neck came back negative after Sunday's scary incident at New England, ESPN and NFL Network reported Monday.

Smith, 24, left the field in an ambulance early in the first quarter against the Patriots after getting tangled up with New England tight end Hunter Henry. It's not clear how Smith was injured on the play.

Smith was transported t