Bills beat writer Vic Carucci answered a question about keeping struggling QB Matt Cassel because he's a veteran.
Carucci: [$4.75 million] is a whole lot of cap space to devote to a backup. I believe the Bills acquired Cassel in a trade with the Minnesota Vikings last March with the intention of making him their starter. Furthermore, I would fully expect the Bills to extend Cassel’s contract to provide cap relief if they are convinced he will have the job.
The fact that hasn’t happened and that there is no indication of it happening any time soon after his struggles through the offseason raise some legitimate questions about whether he will be on the roster if he isn’t starting.
Carucci said he thinks Cassel is wired to accept a backup role as a mentor to EJ Manuel or Tyrod Taylor or any younger starter, but doubts the Bills would devote that much to their cap. With a run-first plan of attack likely still in place, whoever the Bills starter is won't have a ton of week-to-week fantasy value.