Fiddlehead were joined by Quicksand's Walter Schreifels at a Brooklyn gig to perform a cover of Sick Of It All's "It's Clobberin' Time" in tribute to the band's late frontman Lou Koller, who died on 24 July 2026 at the age of 59. The tribute reflects the widespread mourning across the hardcore scene for Koller, who co-founded Sick Of It All and was widely credited with helping to spread hardcore music internationally.

The cover, of the 1995 track from the album "Live in a World Full of Hate", was performed on 31 July at The Warsaw venue, with Schreifels praising Koller's influence before the song. Koller had been diagnosed with adenocarcinoma, a form of oesophageal cancer, in June 2024, prompting Sick Of It All to cancel European tour dates for his treatment; the band, who would have marked their 40th anniversary this year, described losing him as "overwhelming" and thanked fans who contributed to his medical fund.