The rumor of the day, courtesy of the premier rumor mongers in the NFL, is that Cadillac's career may be over. I put zero stock in this rumor, mostly because the PFT crotch puppets have admitted that they have zero journalistic integrity. This is a website which blatantly manufactures stories to generate traffic to their website.
That being written it is very likely we will not see Cadillac for the first part of next season. The knee injury Cadillac suffered (torn patellar tendon) is much more serious than an ACL tear. Before the 2006 season Browns center LeCharles Bentley suffered the same injury (although he also had to deal with serious staph infection) and Bentley has not played since.
It will be interesting to see if the Bucs consider drafting a runningback in this draft. While the Bucs look to be in good shape with Graham as the very-down guy and Michael Bennett potentially being the big-play guy, there is a good deal of back depth in this year's draft.