DiManche played on special teams and started one game at linebacker when the Bengals temporarily lost starters Vontaze Burfict and Rey Maualuga to injuries. The second-year player had appeared in every game this season.
Maualuga has played the last three games after missing four with a strained left hamstring. Burfict has missed the last five games following knee surgery but is expected back in December.
The Bengals didn't immediately fill DiManche's roster spot.
Cincinnati (8-3-1) took control of the AFC North with a 14-13 victory on Sunday at Tampa Bay while the rest of the division teams lost.
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