Fabian Washington likely has a torn ACL, per Harbaugh. Lardarius Webb expected to start in his place now.
If Washington's ACL is indeed torn he will likely be placed on injured reserve, ending his season. Given how vulnerable the Ravens' pass defense has been for large parts of the season, losing one of their starters in the secondary could be rather debilitating for the Ravens.
After dropping another close game, this time to the undefeated Colts, the 5-5 Ravens face an uphill battle to make the playoffs in the crowded AFC field.