Here's how the contracts work:
WMMS is regarded as THE flagship for the Browns Radio Network. Most, if not ALL, NFL teams wish to have their teams games primarily carrried on the FM dial (I don't know when this trend began, but it likely occurred during the Browns' hiatus in the mid-90s). AM skywave be damned - and it is with IBOC. I agree: this translates into WTAM being just an affiliate, only they've never referenced it as such (only as "the AM home of the Browns").
Technically, that's why if Good Karma Broadcasting wanted to get the Browns rights away from CC for WKNR/850, they need either an FM partner/sister station to have a shot.
WTAM had to break away for the Cavs game because they AREN'T the must-carry Browns flagship but ARE for the Cavaliers. I would believe that there was some heavy-duty praying/gnashing of teeth at 6200 Oaktree, but WTAM leaving the game for the Cavs pregame show isn't a mortal sin. Besides, the Browns game was supposed to over in time for 1100 to jump to the Cavs network without a problem. Obviously that wasn't the case, but that's life.
Now, if there was a "nuclear scenario" as a postseason Indians/regular season Browns/preseason Cavs all at the same time, CC has four other stations to dump the spillover on. Naturally, the Cavs game would be PRESEASON - so it would be on either WMJI, WMVX or WGAR. The Browns stay on WMMS, and the Indians on WTAM. Problem solved.
- nate81