The Panthers added a pair of defensive linemen Tuesday.
The team signed defensive end Frank Herron and defensive tackle P.J. Johnson to one-year deals.
The 6-foot-4, 305-pound Herron entered the league as an undrafted rookie from LSU in 2018, and has spent time with the Patriots, Seahawks, Titans, Lions, and Dolphins. He has appeared in seven career games, all with the Lions the last two seasons.
The 6-foot-4, 335-pound Johnson was a seventh-round pick of the Lions in 2019 out of Arizona. He has also spent time with the Chargers, Seahawks, and Cardinals.