Wow. Bet365 has the OVER 8.5 rounds +125. Also Kessler by decision +200, which is lower than I thought it would be. The over bet remains the most sensible option - it covers a Beyer upset win by decision (unlikely but far from impossible) and a Kessler decision and/or late (T)KO.
Again, I feel pretty strongly that Beyer won't be stopped - if he is, it'll be way late in the fight. He's a southpaw and he's got a strong beard - he's faced tough punchers before and was only stopped once in his career, by Glenn Catley (KOBY12)
That line may look like a trap, but it's nothing more than the public being overconfident in Kessler's power.
OVER 8.5 rounds +125
Risking 2 units to win 2.5