Darren Keyton left Thursdays game with an injury that at the time coaches said looked serious. They announced over the weekend that Keyton has issues with his patellar tendon and will miss the rest of the season. While not a major loss for the Lions, it is a big blow for Keyton, who has been fighting for a roster spot with the team for the past couple of seasons. Hopefully he can recover from this injury and get another shot at it next season. With the announcement of Keyton’s injury, the team held workouts for other offensive linemen. I would expect one to be signed today or tomorrow and Keyton to be placed on injured reserve.