Lead singer of the Dropkick Murphys, a Celtic punk band whose song "I'm Shipping Up to Boston" was certified Platinum in 2005.
In 1984, he founded a band called D.V.A.
He founded The Bruisers, which he sang for in Portsmouth, New Hampshire.
He had a son named Stummer Barr with his wife Jessica. Strummer was named after British singer Joe Strummer.
The Dropkick Murphys' iconic song, "I'm Shipping Up to Boston," was written by folk singer Woody Guthrie.