In his first game back from the torn left ACL he suffered in Week 5 last year, Lions cornerback Emmanuel Moseley tore his right ACL on Sunday.
"It's unfortunate, but we just got confirmation on that a little bit ago. Hate it for him and it's frustrating to put all that work in and then this happens on the other one," Lions coach Dan Campbell said Monday. "But, just knowing him and knowing the way he works, this will sting for a little bit, then he'll go back to work, and then he'll come back and be ready to go when the time is right."
He suffered the injury in the first quarter of the Lions' 42-24 victory over the Panthers, which improved Detroit to 4-1. He had been inactive for the first four games of the season.
Moseley, 27, signed a one-year, $6 million contract with the Lions as a free agent before the season. He was one of several free agent additions to the secondary made by the Lions, who also signed cornerback Cameron Sutton and safety C.J. Gardner-Johnson. Gardner-Johnson is currently on injured reserve, sidelined indefinitely with a pectoral injury.
The torn ACL Moseley suffered last season also came in a game against the Panthers, on Oct. 9 last year. Before that injury, Moseley had an interception for a touchdown and five pass breakups with 22 tackles in five games for the San Francisco 49ers.
Injuries played a role in Moseley's five seasons in San Francisco, as he surpassed 12 games in a season just once.
ESPN's Eric Woodyard contributed to this report.