Kenneth William Casey Jr. (born April 15, 1969) is an American musician who is the primary songwriter, one of the lead singers and bassist of the Boston Celtic punk group the Dropkick Murphys.

He is the only original member of the Dropkick Murphys left in the band, though drummer Matt Kelly joined shortly after formation in 1997.

[2] Casey has a small role in the 2016 film Patriots Day, about the 2013 Boston Marathon bombing and the subsequent terrorist manhunt.

Casey was the owner of a sports bar in the Back Bay neighborhood of Boston on Boylston Street near Fenway Park, called McGreevy's, which closed in 2020.

Casey, who publicly backed Mayor Marty Walsh's campaign in 2013, also said that Baker helped several of Dropkick Murphys' charitable causes over the years, including supporting military families.

[14] In 2018, Ken Casey was involved in an accident on a building site and suffered severe damage to one of his vertebral disc which required surgery in May 2018 and caused him to lose feeling in his fingers and forced him to be unable to play the bass during the band's shows until he fully healed.

He was hit in the head by a beer can, causing blood to appear on his face, though he stayed on stage and finished the concert while the involved fan was escorted from the building.

The United States currently is the only major country in the world where radio pays no royalties to the performer or copyright owner and only to the songwriter of the song.

Danny O' Connor (ranked as one of the top 15 boxers in the world), Spike O'Sullivan, Logan McGuiness, Stephen Ormond and Michael McLaughlin currently fight for Casey's promotion.

"[20] Casey has been involved in the ownership of number of bars and restaurants in the Boston area including the Lower Mills Tavern in Dorchester, McGreevy’s (which closed during the COVID-19 Pandemic) and the Yellow Door Taqueria chain.