He had a great career, why end up a cripple. Look at someone like oh say Rolando McClain, 23 yrs old and basically finished in the NFL, he "retired", actually he quit because that's what he is good at it seems. The guy can't stay out of handcuffs and stay away from his 'bros from the hood', one thing probably has to do with the other.
So kudos to Urlacher for doing it right.
