Over at Vikings Journal, I just wrote up a post comparing the growth in MLB payrolls and the NFL salary cap, given the news that the NFL salary cap went up about $10 million this year. I came up with a somewhat surprising result. I don't want to double-post a thread in our forums, but you may want to check it out if you're interested in that sort of thing. 

_{Well, at the end of the day it comes down to revenue I'd imagine.  Baseball contracts are also guaranteed, so I'd expect them to rise a bit slower.}