There's one problem: The Ravens didn't list him on the injury report, which is a violation of league rules. So either the Ravens chose not to disclose the injury or Reed isn't really that hurt.
If Reed does have a significant shoulder injury, he should sit and take time to get healthy. A torn labrum could take around six weeks to heal. Not everyone will agree with this because of the current state of the Ravens defense. Injuries have already sidelined Baltimore's best player on defense (Terrell Suggs), its leader on defense (Ray Lewis) and its best cornerback (Lardarius Webb). It seems like the Ravens would need Reed more now than ever.
But the Ravens need a healthy Reed. They need an aggressive Reed. They need the Reed who was physical against the Patriots when he broke up a touchdown pass in the end zone with a hit.
Reed wasn't that player on Sunday against the Dallas Cowboys. There were times Sunday when Reed tried to push players out of bounds instead of tackling them, which allowed the Cowboys to pick up extra yards. He finished with three tackles, no interceptions and no passes broken up.
If Reed chooses to continue playing, he can't be as ineffective as he was last Sunday. The Ravens need all 11 players swarming to the ball when they play the Texans, the sixth-best run offense in the league.
Losing Reed would be another big hit to the Ravens defense. But Reed playing at this level leaves the defense just as vulnerable.