Detroit Lions tight end Dorin Dickerson was placed on injured reserve with concussion-like symptoms.
Dickerson admitted earlier in the week that he hid a concussion from team physicians.
"Got a little concussion. Should have reported it," Dickerson said after telling reporters he did not remember speaking with the media following a Week 16 loss to the Giants.
"I thought I could get away with it," he said.
Dickerson had a dropped pass and a costly holding penalty on the Lions' only drive of overtime, which resulted in a punt.
To take Dickerson's spot on the 53-man roster, the Lions signed tight end Matt Veldman and added wide receiver Carlin Isles to the practice squad.