Jeff Emig came back to Loretta's and got beat by Kevin Walker in the +30 class one year. He was not the same level as RC (No one is), but he did win a SX title and MX outdoor Title in his career, so I'd say he's just as big a former guy as you can get to come back.
I sent an email to Davey Coombs about changing up the age classes to get more contestants and hype for the event. I suggested that they change the Current groups of +25, +30B/c, +35, +40, +45, and +50 (which has one amatuer class and 5 former pro classes essentially) to a new format of:
+25, +30 PRO, +30 B/C, +40 PRO, +40 B/C, and +50. Keep the same # of classes and make two former PRO classes and try to get the guys like RC and others back to the ranch racing again. Would be huge for the sport and kids that are coming up and give older non former pros a place to ride too.