The Lions couldn't find a suitor for Jamie Collins.
Detroit released the veteran linebacker on Tuesday, a week after he was removed as a starter.
The Lions kept Collins out of practice and away from the team after Dan Campbell said they met with the 31-year-old.
They hoped to make a trade as recently as Monday. Campbell said last week they had suitors for a deal.
"We’re still working on it right now," Campbell said Monday. "That’s still in the works."
Derrick Barnes and Jalen Reeves-Maybin shared time in place of Collins in the loss to the Ravens.