The 2017 fallout led to Brand New canceling all remaining tour dates, and the band largely disappeared from public view.
“None of us were aware this was happening," LaPlante wrote on social media.
Cocker is up for the Class of 2025 alongside 13 more nominees.
The 34-date outing will feature support from Jimmy Eat World and New Found Glory.
The enigmatic singer's mystery train rolled on Sunday night (March 2) when he opted out of celebrating his own biopic, "A Complete Unknown."
Neil Young & The Chrome Hearts will launch their European tour with a free show in Ukraine this June.
“Thank you, Joey…for keeping the band’s music alive for so long and for being a friend to us all,” a Facebook post read.
The singer had revealed his cancer diagnosis in February.
The Ronnie Radke-led band notches its second No. 1 in a row, following “All My Life.”
The retired group has only performed in public one time since their last gig in 2008.