Originally Posted by thunderkyss
RBs have short careers, because most of them suck. If you find a true franchise back, MJD, Steven Jackson, Frank Gore, even Chris Johnson... you can get your money's worth.
If you're not a franchise guy, you're easily replaceable with the number of guys coming out of college.... pretty much like QB. You've got a very short time to prove you're difficult to replace.
Chris Johnson before he got paid or after?