He was soooo bad in New England over the last 2 years it was downright comical.
He got 0 carries last year

and has been hurt. Hardly a reason to say he's been bad.
He hasn't been in NE the past 2 years anyway. He was hurt part of 2004 in NE, yes. In 2005 he was healthy and on the Denver practice squad where he began to learn what it takes to be an NFL running back (paraphrasing Cobbs).Guys who come on this board acting like they are soooo sure Cobbs could never get the job ought to just look at the past. Olandis Gary, Mike Anderson, Quentin Griffin, Reuben Droughns, even late-round pick Terrell Davis all got a shot due to circumstances at that time. Some did a lot with that chance, some did less.
All we really know this year is that Dayne and Bell are the current favorites. They could split carries like Anderson and Bell did, or one could get hurt/underperform and the other shine and become featured. Injury or underperformance could also open the door for Cobbs or Sapp. We don't really know. We can just guess.
If the speculative hype gets out of hand and people are grabbing Cobbs higher than his current status warrants, let someone else have him. But, if you have roster space to allocate to a sleeper or flyer-type player and can get him cheap enough, you could do worse than having someone like Cobbs on your bench.