No, but a guy who's hit the canvas often enough to qualify for frequent flyer miles does have a glass jaw. Beginning with his nearly getting starched by light-hitting journeyman Donny McCrary in 2006, this guy has been bounced up off the canvas more than LeBron James' basketball! That ANYONE would deny that Allan Green has a glass jaw shows how badly modern boxing fans need to be educated about the importance of punch resistance!!! atsch