Former football star Herschel Walker and former heavyweight champion Larry Holmes say they are all too aware of the toll that blows to the head can take on an athlete's brain.
In remarks Tuesday during a Capitol Hill news conference on brain research, Holmes introduced himself by recounting his record — 75 fights, including 69 wins with 44 by knockout.
"My intent was not to hurt anybody," said Holmes, appearing with boxers Paulie Malignaggi and Austin Trout and mixed martial artist Phil Davis. Mentioned throughout the news conference was heavyweight great Muhammad Ali, who suffers from Parkinson's disease.
Sen. John McCain, R-Ariz., and Dr. Charles...