Weatherly, who signed a two-year, $12.5 million deal with the Panthers in March, started the first nine games. He had no sacks, three quarterback hits and 17 tackles in playing 61 percent of the defensive snaps.
His offseason release would save the Panthers $5.95 million against the 2021 salary cap, with $2 million in dead money.
Bonnafon spent most of 2020 on the team’s practice squad. He played 23 offensive snaps, gaining 87 yards from scrimmage and scoring one touchdown.
Bonnafon aggravated the high-ankle sprain that had him on the practice squad injured reserve list earlier this season.