Yes. People have to remember that a 4-3 RDE and a 3-4 ROLB are basically the same player, and is usually your best weak-side (blindside) rusher.
Think about DeMarcus Ware.
A 4-3 DE at Troy and came to Dallas to play 3-4 OLB for Parcells in Dallas.
Moved to DE when Cowboys moved back to 4-3.
Signs with Denver, moves back to 3-4 OLB in Wade Phillips scheme.
Mario Williams went back and forth in Houston's scheme, went to Buffalo as a 3-4 OLB, now playing 4-3 DE for Dolphins. Julius Peppers was a 4-3 DE for Panthers and Bears, and is now a 3-4 OLB for the Packers.