I was admittedly never a big fan of Irons anyway, but he seems nigh on untouchable at this point. ACL injuries take 2 years to recover from.
It's one thing if you've proven yourself in the league (e.g. Edge). Then teams are willing to wait on you; they know you're probably worth it. But I just don't see how the Bengals can consider Irons part of their long-term plans at this point.
Let's say that Irons is around the #5 most talented back this year, pre-injury (seems to be CW). Let's say that post-ACL injury, he is around the #7 most talented back this year (I assume that, like Edge, he will be somewhat diminished). And let's say that this was an average draft as far as RB talent (I think it was below average).
That means that by the time Irons is really recovered--two years from now most likely--12 more talented RB's will have entered the NFL. If you're the Bengals GM and you're trying to build for the future and maintain depth for a playoff team, are you really going to make a big bet on Irons?
I'm not saying his NFL career is over, but you have to consider this very very bad news.
Poor guy