A.J. Green's injured knee kept him out of the Cincinnati Bengals practice again on Friday, and according to Bengals.com, the rookie wide receiver will be listed as doubtful for Sunday's game against the Baltimore Ravens.

Green suffered the injury on a touchdown catch against Pittsburgh last week, and had hoped to return to practice and play on the hyperextended knee that has a bone bruise, but it appears as if he will sit out the key AFC North battle.

The Ravens will be missing a key part of their defense for the game with Ray Lewis out because of a toe injury.

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Terry McCormick covers the Titans for TitanInsider.com