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Montee Ball made a mistake by returning for his senior season.
He had an unbelievable junior year in which he went from more than 2,000 all-purpose yards and 39 total touchdowns, tying a record set by Barry Sanders.
The Wentzville, Missouri native won't be able to match that production this year.
Much of Ball's success came because the Badgers had a dangerous and efficient quarterback.
Wisconsin is hoping that Maryland transfer Danny O'Brien will be able to slide in and lead the Badger offense just like NC State transfer Russell Wilson did last year.
But, simply put, O'Brien is no Wilson. Last year, O'Brien threw for just 1,648 yards and carried a 7:10 touchdown to interception ratio over nine games. Yes, that means 10 interceptions in nine games.
Meanwhile, Wilson threw only four interceptions in 14 games, leading him to a 191.8 passer efficiency rating. He was exactly the mistake-free efficiency machine the Badgers needed to run their smash-mouth offense and complement Montee Ball.
If O'Brien starts, don't expect him to be as effective as Wilson, and if he doesn't, don't expect Joe Brennan, the other expected contender to be as prolific as Wilson was either.
Additionally, Ball and whoever the starting QB is will have to deal with huge losses on the offensive line, which usually anchors the Wisconsin offense.
The Badgers lost the entire right side of their line, including a first and second round NFL draft pick, not to mention Nick Toon, their leader in receptions and receiving touchdowns last season.
Wisconsin will be good this year, but it certainly won't be as strong as it was a season ago, especially in what should be one of the strongest Big Ten conferences we've seen.