Bell struggled with injury to his right foot in the preseason, and may have aggravated it again against the Jets.
Keisel injured his ribs, and has not returned to the game.
Steelers vs. Jets: News and updates leading into Week 6
The Steelers taken on the 3-2 New York Jets in regular season NFL action Sunday. Here's how you can watch today's game.
Neal Coolong and Lance Williams break down the Jets, the multitude of recent Steelers roster moves, and what to make of GM Kevin Colbert going to watch a Louisville game - and presumably highly touted QB prospect Teddy Bridgewater.
Apparently, Cameron Heyward not starting over Ziggy Hood is more than just a sub-package thing. He'll get the start over Hood in Week 6 against the New York Jets. How much that impacts the defense remains to be seen, but changes are being made.
We saw last year, when the Steelers gave a three-year extension to Steve McLendon after playing him eight snaps a game, what can happen by leaving productive players on the bench. Getting Heyward on the field wouldn't hurt in Week 6.