Quinn Johnson has been downgraded from doubtful for Sunday's game against the Pittsburgh Steelers to out for the season.

On Saturday, the Titans placed their fullback on injured reserve with a quadriceps injury, one that comes on the heels of a hamstring injury that kept him out of the final two preseason games.

To replace him in the lineup and on the roster, the Titans promoted fullback Collin Mooney, a former West Point standout, from their practice squad.

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Terry McCormick covers the Titans for TitanInsider.com