Can you elaborate? I'm open to debate but it doesn't seem very plausable when you think about it. Wouldn't that require all the players and coaches to be in on the sham? So all that passion from your favorite players is totally faked? When college players get to the NFL are they just told the truth and nobodies expected to tell a soul?
And if the players and coaches aren't in on it and only the refs and orgsnization are, then it's not totally rigged. Refs can only do so much to ruin a game. They didn't make Russel Wilson throw the ball at the 1 yard line. If you look at Russels face, Pete Carrols face, and everyone on the teams face it was obviously real shock and a punch to the gut on that fateful superbowl play. That's just one example.
So how does this rigging work exactly?
In basketball, you pay off guys who get a lot of court time and handle the ball a lot. They can control the score by missing shots, giving bad passes, playing poor defense. A player can't single-handedly win or lose a game but may be able lose so as to not cover the spread.
In football, you pay off the players who are going to be touching the ball or directly affecting the score, like quarterbacks throwing interceptions, running backs dropping the ball, wide receivers not catching a catchable pass, field goal kickers missing an easy field goal, snappers flubbing a key hike. The quarterback may not even be in on it. If you consistently let linebackers slip through the O line, that puts pressure on the QB and he's going to be forced into throwing a bad pass or get sacked.
And if the game starts getting away from you and the momentum is one-sided, then you have to stop the momentum but shutting off the electricity so the game can't get played in darkness.

That's a desperation move by the elite Vegas bookies.

We haven't seen that happen but it could.
