Should the Bengals be shopping for backup QB?

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Mike Santagata (@bengals_sans) tweeted yesterday (and intimated on LockedOn) that he thinks they have completely changed the scheme around for the PS, to see if the team can switch up if Burrow goes down, 'cause Browning cannot run the spread offense that we run (but Siemien can) and that could be why both have struggled: Siemien because he can't do what we do normally and Browning because he just sucks and causes chaos lol. (FTR, he said he's pick Browning because he'd rather a backup be chaotic)

That was a hypothesis he had, not that it is a dead-on accurate fact or anything.

Still, something to think about.