http://i50.tinypic.com/35ba0lt.jpg <--base CC no follower, just passives(barb)
http://i48.tinypic.com/fcti87.jpg <--CC with scoundrel as pet
http://i45.tinypic.com/egu8uf.jpg <-- CC with Battle Rage
http://i48.tinypic.com/29erla9.jpg <-- CC with BR, Overkill(killing spree), and Revenge(Best Served Cold) but still just 83% whether KS or Revenge is proc'd with BR
Base with scoundrel is 71.5% CC, those skills all proc'd should boost it to 94.5%
Couldn't find anywhere that a cap was involved on CC.