The Cincinnati Bengals placed center Kyle Cook on injured reserve and signed tight end Richard Quinn.
Cook injured his ankle during an Aug. 23 preseason game against the Packers. He was given the new "designated for return" tag.
Under the new guidelines, an NFL club can return one player on injured reserve to the active roster later in the season (at least 42 calendar days). Cook is eligible to practice as early as the week of the Oct. 21 game against Pittsburgh and play as soon as Nov. 4 against the Broncos.
Quinn, who was cut by the Redskins last week, has one catch in 30 career games with Denver and Washington.