The pain never really goes away.

It has been months since the Seattle Seahawks lost to the New England Patriots in Super Bowl XLIX, but head coach Pete Carroll is still stinging. Specifically, he's haunted over that one fateful decision.

Should the Seahawks have run the ball instead of having Russell Wilson throw a short pass that was intercepted by New England's Malcolm Butler?

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"You'll never know," Carroll told Sports Illustrated as his team enters training camp.