Bob Rock

In February 2006, Metallica chose producer Rick Rubin to produce their next album, ending the band's long-time relationship with Rock. At Metallica's 30th Anniversary Concert on December 10, 2011, Rock joined Metallica onstage and performed bass alongside Trujillo on the songs "Dirty Window" and "Frantic".

Rock briefly returned to performing, forming the band Rockhead with ex-Payolas drummer Chris Taylor. The band released one self-titled album and two singles before splitting up. Rock produced the five finalist songs of CBC Sports's Hockey Night in Canada Anthem Challenge in late 2008.

Rock's career both as a producer and musician was recognized at the 2007 Juno Awards Ceremony in Saskatoon for his lifetime contribution to popular music. He was inducted into the Canadian Music Hall of Fame by the Canadian Academy of Recording Arts and Sciences (CARAS). "Bob is a musical craftsman whose wide range of talents show no signs of slowing," said Melanie Berry, CARAS President. "He has helped to define rock as we know it today, and we are very proud to recognize him in the Canadian Music Hall of Fame."

Rock last won Producer of the Year in 2005 for Simple Plan's "Welcome to My Life". He has been nominated for 2007 Producer of the Year for his work on The Tragically Hip's album World Container. In 2014, Rock won a Grammy Award for Best Traditional Pop Vocal Album for his work on Michael Bublé's album To Be Loved.

In 1990, Rock was chosen to produce Metallica's Diamond-certified (16x Platinum) self-titled album (commonly referred to as The Black Album). He subsequently produced Load (1996) and ReLoad (1997) as well as the new material for the band's cover album Garage Inc. (1998). After Jason Newsted left Metallica in January 2001, Rock wrote and recorded all of the bass guitar parts on the 2003 album St. Anger. He played bass during the band's few live performances until Robert Trujillo joined the band in February 2003. Rock was featured prominently in the 2004 documentary film Metallica: Some Kind of Monster. The film dealt with Metallica's internal strife and their struggles with the creative process during the recording of St. Anger.

In 1983, the Payolas won the Juno Award for Single of the Year. Rock also worked as an assistant engineer at Little Mountain Sound in Vancouver. In 1987, the band (who had by then changed their name to Paul Hyde and the Payolas) again changed their name to Rock and Hyde and had a hit single in Canada with the song "Dirty Water". The song also charted on Billboard's Hot 100. In 2007, the Payolas became briefly active once more as a touring and recording act, releasing the EP Langford Part One.

Rock began his music career in Langford, British Columbia (a suburb of Victoria), as a guitarist playing with friends William Alexander and Paul Hyde in the former's household basement. After high school graduation, Rock left Victoria and became the co-founder of the Payolas, who became well known with the success of their 1980s hit, "Eyes of a Stranger", which was used as part of the soundtrack of the movie Valley Girl starring Nicolas Cage.

Robert Jens Rock (born April 19, 1954) is a Canadian musician, sound engineer, and record producer, best known for producing rock bands and music artists such as Metallica, the Tragically Hip, Aerosmith, the Cult, Bon Jovi, Mötley Crüe, 311, Our Lady Peace, Bryan Adams, the Offspring, Michael Bublé, Black Veil Brides, David Lee Roth, and Ron Sexsmith.