Jim McMahon (No. 9) / George S. Halas (Team Owner). McMahon joined the Bears in 1982. After his passing, they added his initials to jerseys. The ...
The Athletic) Jim McMahon was the Bears' Super Bowl-winning wild man : r/CHIBears
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What does the 'GSH' on the Chicago Bears football jersey stand for? - Quora
What does the 'GSH' on the Chicago Bears football jersey stand for? - Quora
What does the 'GSH' on the Chicago Bears football jersey stand for? - Quora