Slam Dunk Festival 2022 has announced a third wave of acts for its biggest year yet. Canadian punk-rock titans Sum 41 will return to the bill in the headline slot and Celtic-American punk mob Dropkick Murphys join the lineup as the festival’s third headliner alongside post-hardcore heavy-hitters Alexisonfire, who were announced in September. Previously announced headliners Rancid are no long...
