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As a player shows nicks and dings and DL time, it's often going to show up in the ol' reflexes...
You could run a study on it, correlating DL-time increase past 30 to age-decline, but it would so obviously correlate that it wouldn't be useful... we know that age causes both decline and increase of injuries...
Hudson isn't 27 any more, and is year-to-year IMHO, but will probably be a good player in 2010...