They did not.
League and team sources told ESPN senior NFL analyst Chris Mortensen that the Bengals will place Hall on injured reserve for the remainder of the season after learning he tore his left Achilles tendon during Sunday’s 27-24 win at Detroit. An MRI apparently came back positive, confirming suspicions about the injury’s severity. No official word has come from the team, and it likely won’t until a corresponding roster move is announced. That move should come Tuesday.
Source: Coley Harvey, ESPN.com