I remember when Ali cracked Foreman's chin. Then everybody was stopping him. Lyle, Frazier, Qawi, Cooper, Cooney, Holyfield, Morrison, Moorer, Briggs. Once you get stopped, it's over for you, chin-wise.
No way. Nallege told me he's been knocked out no less than 8 times but the referee was bought off by Arum. His chin is glass since Torrecampo punched him in the nuts and made his head bounce off the canvas. But, that's how hard Torrecampo hit. He could punch you in the nuts and ruin your chin for life.