Ron Edwards, DT
The Panthers signed Ron Edwards to a three-year deal last summer, hoping Edwards could provide some quality beef in the middle of the defensive front. During his very first practice with his new team, though, Edwards sustained a torn triceps injury that cost him all of 2011. Set to be 33 when his 11th NFL season begins, there are doubts Edwards will provide the depth the Panthers' defensive line needs. But with no help coming at defensive tackle this offseason, he'll have to bring something.