*Johnny Knox set down his helmet and began signing autographs after the last public practice of training camp in Bourbonnais on Thursday.
One boy, who couldn't have been more than 4-years-old, handed him a Bears helmet to sign, which Knox did with a silver marker.
The boy then put the helmet on and walked away.
Knox didn't realize until a few minutes later that he had just signed his own helmet. He had to chase the boy down to get it back.