From OddShark:
From VegasInsider:
From 538:
Certainly the Cubs are the favorites--they scored the third most runs in baseball and gave up the fewest. They also won the most games. They are the best team. But the Indians are good. They were expected to do well this year and they have played well all season and beat two good teams to get to the Series. So a Cleveland upset is not unreasonable. It would be a good bet. The favorites don't win as often as they "should" in baseball, I'm not sure why that's the case other than to say "anything can happen" in a small handful of games.