Hagler’s wife, Kay G. Hagler, confirmed that the fabled fighter’s death on his Facebook fan club page on Saturday, March 13, 2021. His son, James, detailed in other FB posts how Hagler was rushed to a New Hampshire hospital emergency room after suddenly complaining of chest pains and shortness of breath. Yahoo! Sports reports that Hagler died four hours later.
He is survived by his wife Kay, whom he married in 2000, and his five children from his previous marriage to Bertha Hagler from 1980-90.