Pretty much everything you'd need is
here. Obviously, Madden doesn't account for roster or workout bonuses. But that site has all the contract values on a year-to-year basis as well as guaranteed money. Just going through a couple of the top Chiefs players I found some pretty significant inaccuracies in just basic contract numbers so I'd imagine most players likely are the same. And as I mentioned before, the fact that every players contract escalates doesn't help matters either.
Dwayne Bowe:
Madden - 5 years, $60 million, $10 million bonus
Actual - 5 years, $56 million, $15 million bonus
Tamba Hali:
Madden - 5 years, $65 million, $15 million bonus
Actual - 5 years, $57.5 million, $14.823 million bonus
I noticed too that guys like Derrick Johnson had zero bonus/guaranteed money in Madden despite the fact that he received $15 million in guaranteed cash when he signed his extension. Same with Eric Berry where his bonus almost matches his real life guarantees but about $4 million of guaranteed money isn't part of the bonus.