When I think about glass jaws , I think about the UK - world capital of glass jaws , that gave us amir khan, jaw calzaghe, herbie hyde,lennox, hatton, enzo,Fury, fraudley .
James Kirkland, Roy Jones jr, Tommy Morrison, Tommy Hearns, Vernon Paris, Mike Jones, Zab Judah, Tony Thompson, pay attention to your own country :good Read above.
This made me laugh but I dont agree. Even the likes of Cuba, Puerto Rico, Mexico among others have a share in glass jaws..