There aren't many rock stars whose band's debut album sells nearly 20 million copies thanks to eight tracks that continue to get played on rock radio more than 30 years later. And there are even fewer who are so anonymous they could slip by most people unnoticed at the mall or even at one of their own concerts. But that's the story of Boston singer Brad Delp, who on Friday died at age 55 of undisclosed causes after leading one of the most understated rock and roll lifestyles of all time. Delp was the man who lent a muscular voice...
