The Panthers have 28 players who will be free agents when the 2019 league year begins in March.
We already know that Ryan Kalil is retiring, so he won’t be re-signed. It’s also possible that 2018 was the last time we see Julius Peppers, but he hasn’t made his decision final as of today. Thomas Davis has said multiple times that he’d love to come back to Carolina for at least one more year.
Devin Funchess will get a multi-year deal somewhere, but considering that he was a healthy scratch in the season finale against the Saints, it’s probably unlikely that the multi-year deal will come from Carolina.