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Legursky saved the day in 2010 when he was able to effectively replace Maurkice Pouncey when he was injured during the playoffs.
Since then, Legursky has been just acceptable. He's not good at guard, which is the position where the Steelers have slotted him so often. He's a much better center and even played some there this year while Pouncey was moved over to guard.
The Steelers have to decide how they want the future to go. If they want to get a center that's just that, then they could let him go. But if they're still in on versatility, Legursky is hard to pass on.
Sign him if he's cheap. If he's looking to start, which he could at center, then let him walk away.