Cassel has been joined by either EJ Manuel and Tyrod Taylor in taking reps with the top group in 11-on-11 action. Taylor rotated with Cassel on Friday and Sunday, while Manuel took reps with Cassel on Saturday.
"We put [Cassel] there. That's what we want to do," coach Rex Ryan said after Sunday's practice. "With his experience, we think it's more important that he's always rotating with that group. Tyrod is going to get his equal turns at the one spot and so is EJ.
"So it's like, we're putting him there, but then to him running some other ones, they go down to the threes. Because they're younger, they're going to be with some of these younger guys. And we think that's the best way to develop these quarterbacks."
It's also worth nothing the story added Cassel's performance in practice hasn't stood out above Manuel's or Taylor's and, at times, has been worse. But on Sunday, it was Manuel who lagged behind Cassel and Taylor. When the Bills broke into a single 11-on-11 drill at the end of practice (as opposed to their simultaneous "two spot" drill), Manuel held the ball too long on his first dropback for a sack and then overthrew Chris Hogan on his second dropback, the story said. In this run-first offense, whoever wins the job isn't expected to put up huge fantasy numbers.