Keenan in 2015 to record a new album, followed by a tour. They planned to begin work on their new album in January 2015. On January 14, 2015, Corrosion of Conformity announced a six-date UK tour, which took place in March and was their first tour with the Deliverance lineup in 14 years as well their first one with Keenan in nine years. Corrosion of Conformity performed their first show with the re-united Deliverance era line-up of Pepper Keenan, Woody Weatherman, Mike Dean, and Reed Mullin on March 7, 2015, in Manchester, England. Their first US tour with the reunited line-up, supporting Clutch, was announced on July 28, 2015. On June 6, 2016, Corrosion of Conformity announced the letting go of drummer Reed Mullin after a prolonged battle with alcohol addiction, resulting in a seizure before their concert in Edmonton, Canada on the Lamb of God / Clutch Tour. Mullin returned to the drum stool on the tour on June 8. On November 10, 2017, the band announced that their tenth studio album, No Cross No Crown, would be released on January 12, 2018. The album's lead single "Cast the First Stone" was premiered on the same day. Mullin died on January 27, 2020. His replacement was immediately announced to be John Green from Manchester, England, who previously worked as the band's roadie and stepped in as a stand-in in 2019 for numerous shows. Collaborations and side projects They have also collaborated with a number of other artists: James Hetfield of Metallica contributed vocals to the song "Man or Ash" on Wiseblood; Warren Haynes of the Allman Brothers' Band and Gov't Mule played slide guitar on "Stare Too Long" on America's Volume Dealer; and Stanton Moore of Galactic played drums on In the Arms of God. Members of COC have also participated in collaborations: Keenan plays guitar with the metal supergroup Down, and Dean contributed vocals to a track titled "Access Babylon" on Dave Grohl's Probot project. Pepper also appears on Metallica's Garage Inc. cover record, playing guitar and singing the second verse of the Lynyrd Skynyrd song "Tuesday's Gone". He appears in the documentary Some Kind of Monster, auditioning to be Metallica's replacement for Jason Newsted. Members Current members Woody Weatherman – lead guitar, backing vocals (1982–present) Mike Dean – bass, keyboards, co-lead vocals (lead 1984–1986 and 2006–2015, backing otherwise) (1982–1987, 1993–present) Pepper Keenan – rhythm guitar, lead vocals