I'm sure the outcome of some games through they years have had impact from someone having something to do with a fix, but I don't believe it's something that is going on, on a regular basis.
BUT.........When you think about it, it would be VERY EASY for Vegas & all professional sports to run a "Business" by fixing games.
With all of the sophistication today, it could happen something like this.
Lines are set & put out
People wager on games
It takes some time to find out a percentage of what side the majority of bettors have wagered on each games' side and/or total, etc.
But with all of the computer technology, by HALFTIME all of this info could be sent to one specific place, in Vegas more than likely, that gives all of those details mentioned above, what % of bettors from across the nation/etc. has bet on each game, then Vegas, or whoever is in charge, goes from there, halftime.
It would then be easy for them to all make communication with officials at each game, or once again, whoever is in charge and needs the information passed to, to help do whatever is necessary to help determine the outcome of the game, with that outcome obviously being whatever side that benefits Vegas and/or casinos in general everywhere possibly.
Maybe this is why we see such ridiculous changes, comebacks, or endings in games from time to time that seem impossible to happen........:think2:
All of this is not likely, but not far-fetched at all.........!~~~!