Urlacher, who turns 35 years old at the end of May, gracefully announced his retirement on Wednesday. He will leave behind a decorated career in Chicago that included eight Pro Bowls, five All-Pro selections, a Defensive Player of the Year award (2005) and an inclusion on the NFL's All-Decade team of the 2000s.
He'll also walk away as the leading tackler in Bears franchise history.
A clear candidate to be a first ballot Hall of Famer in 2018, Urlacher finishes his NFL career as one of the best linebackers to ever play the position.
But where does he rank all-time? The following list will help place Urlacher among the NFL's historical greats at the linebacker position.
Note: All stats courtesy of Pro Football Reference.