"If anyone can get the underachieving Sullivan to play the way a first-round DT should play, it will be Seymour, who is emerging as the leader of the Patriots defense now that Willie McGinest is playing for the Browns."
He forgot about Tedy.
One thing I noticed. Sullivan has 77 tackles in his career and only 17 starts (and 36 games total). That's 4.53 tackles per start (2.14 per game).
Richard Seymour has 244 tackles in 71 career games (I can't find a site that gives me starts, but Seymour has started most, if not all, games he has played in, aside from the very beginning of 2001). Seymour has 3.44 tackles per game(/start).
Vince Wilfork has 67 career tackles in 32 games (Wilfork split time with Traylor his first year). That's 2.09 tackles per game.
In 48 career games, Ty Warren has 149 career tackles. That's 3.10 tackles per game.
Just one way to look at it, and I know there are quite a great deal of fallacies in this measurement (the sack numbers are way off... .25 sacks per Seymour start vs. .08 sacks per Sullivan start, taking Sullivan's tackles from games where he didn't start into consideration, etc.) Kind of an interesting stat, though.