Danny Williams is more shot than all of them, taking brutal beat downs of poor journeymen (Carl 'the fridge' Baker). Castillo is well shot as is rahman. Not sure on Mosley, it was only two fights ago when he was supposedly to his best so im willing to give him another fight or two before i judge. Taylor could probably fight on but would have to drop a level. Aint watched Arce since he fought Darchinyan and he looked like he was on the slide then. Other honarable mentions would be Kelly Pavlik (possibly), Evander Holyfield, Enzo Macaranelli, Roy Jones Jnr, Jeff Lacey, Ronald 'Winky' Wright (is he still active), Marco Antonio Barrera, Eric Morales, Israel Vasquez (cuts) and Juan Diaz.
Jermain Taylor will be back on Showtime this fall. At least that was the latest word. I hope he doesn't do it.
(IMO, From Worst to least) 1. Jose Luis Castillo 2. Hasim Rahman 3. Jermain Taylor 4. Jorge Arce 5. Shane Mosley