Arlovski has been a master of reinventing himself as needed. I haven't seen much of the "old guard" adapt to a sport that evolves as quickly as MMA has as well

Arlovski has been a master of reinventing himself as needed. I haven't seen much of the "old guard" adapt to a sport that evolves as quickly as MMA has as well as he has done so. That said, I would probably put Frank Mir right up there on adaptability, and Mir's last fight against Todd Duffee was simply amazing.