Denver Broncos All Star Donating Brain To Science

Kaminski -- who was the starting center for the Broncos from 1966 to 1973 -- suffers from severe depression ... which doctors say was caused by concussions Larry sustained during his career.

Now, we're told 66-year-old Larry has pledged to donate his brain to the Boston University School of Medicine Center for the Study of Traumatic Encephalopathy ... in the hopes of helping future football players learn about the long term affects of concussions.