Boxer Michael Quarry dies at 55 : Mike Quarry, the younger brother of hard-punching heavyweight Jerry Quarry who lost to Bob Foster in his own bid for the light heavyweight title, has died. He was 55. Quarry died Sunday night at The Seasons in La Habra, an assisted living community. He started not being able to talk or walk three months ago. The cause of death was pugilistic dementia, the same disease that had turned Jerry Quarry into a confused, childlike man before he died at 53 in 1999.