After his cast was applied too tightly to allow for swelling , gangrene set in , requiring amputation of his leg .
Playing sports as a young man , Wilson was a promising athlete before breaking his leg in a football scrimmage when he was 15 years old .
After Wilson 's cast was applied too tightly to allow for swelling , gangrene set in , requiring amputation of his leg .
Playing sports as a young man , Wilson was a promising athlete before breaking his leg in a football scrimmage when he was 15 years old .