Question: This American musician has played for both heavy metal band Tremonti and "family band" Van Halen.
Context: The 1984 Tour was a North American concert tour by hard rock band Van Halen in support of their album "1984".  The tour was very successful but tension between the Van Halen brothers and Roth was high.  After the tour, the band continued to promote the album on their Monsters of Rock Tour 1984 (a short European festival tour to compensate for the main "1984 Tour" being North American only), and then David Lee Roth left Van Halen.  He would not perform live with them until the 2007 reunion tour.  The tour was one of the band's longer ones, but was divided into four separate legs.  American glam metal band Autograph was an opening act for the tour. Wolfgang William Van Halen (born March 16, 1991) is an American musician.  He is the bassist for Van Halen, having replaced Michael Anthony in 2006.  He is also the former bassist for the heavy metal band Tremonti.  At (2017)-(1991)-((11)<(03)or(11)==(03)and(29)<(16)) years old, he is the youngest member of Van Halen. Dust is the third album by heavy metal band Tremonti.  It was released on April 29, 2016 via FRET12 records.  "Dust" was recorded during the same time that "Cauterize" was being recorded.  The record was produced by Michael "Elvis" Baskette, who produced Tremonti's past two records and also produced Alter Bridge's records. Samuel Roy Hagar (born October 13, 1947), also known as The Red Rocker, is an American rock vocalist, guitarist, songwriter, musician and entrepreneur.  Hagar came to prominence in the 1970s with the hard rock band Montrose.  He afterwards launched a successful solo career, scoring an enduring hit in 1984 with "I Can't Drive 55".  He enjoyed huge commercial success when he replaced David Lee Roth as the lead singer of Van Halen in 1985, but left the band in 1996.  He returned to the band for a 2-year reunion from 2003 to 2005.  On March 12, 2007, Hagar was inducted into the Rock and Roll Hall of Fame as a member of Van Halen.  His musical style primarily consists of hard rock and heavy metal. A Different Kind of Truth is the twelfth studio album by American hard rock band Van Halen.  Released on February 7, 2012, by Interscope Records, the record is Van Halen's first full-length album of studio material with former lead singer David Lee Roth since "1984".  Likewise, it is Van Halen's first studio album since 1998's "Van Halen III".  It is the first to feature Eddie Van Halen's son Wolfgang on bass guitar, replacing Michael Anthony, who had played bass on all of Van Halen's previous albums. "Spanish Fly" is an instrumental solo played on a nylon string acoustic guitar by Eddie Van Halen.  It was featured on his band Van Halen's 1979 album "Van Halen II".  The track was viewed by critics and fans alike as a follow up to the electric guitar instrumental "Eruption" from the band's first album "Van Halen" released in 1978. Tremonti is an American heavy metal band founded and fronted by lead vocalist and guitarist Mark Tremonti, best known as the guitarist of the American rock band Creed, and the lead guitarist of American rock band Alter Bridge.  The band also consists of rhythm guitarist Eric Friedman and drummer Garrett Whitlock.  Bassist Wolfgang Van Halen was in the band between 2012 to 2017.  What originally started as a Mark Tremonti solo project evolved into a fully fledged band after the release of the group's first album, "All I Was", in July 2012.  That album featured Tremonti himself playing guitar in addition to lead vocals, and the band was joined by Tremonti's Creed and Alter Bridge bandmate Brian Marshall playing bass on tour until his departure later that year.  He was replaced by Van Halen bassist Wolfgang Van Halen, who contributed to the band's second album, "Cauterize", which was released on June 9, 2015.  The band also has another album, entitled "Dust", in April 2016, serving as a continuation to "Cauterize". Van Halen Rising: How A Southern California Backyard Party Band Saved Heavy Metal, or also just known as,Van Halen Rising, is a 2015 biography written by Greg Renoff, a Ph.D. in American History, about the early history of the popular rock band Van Halen.  The book also includes interviews from notable musicians, such as, former Van Halen bassist Michael Anthony and power players like Pete Angelus, Marshall Berle, Donn Landee, Ted Templeman, and Neil Zlozower. "Hot for Teacher" is a song by the American rock band Van Halen, taken from their sixth studio album, 1984.  The song was written by band members Eddie Van Halen, Alex Van Halen, Michael Anthony and David Lee Roth, and produced by Ted Templeman.  It was released as the fourth and final single from the album in October 1984.  It was the final single released by Van Halen's original lineup. Cauterize is the second studio album by Tremonti, a band fronted by Creed and Alter Bridge guitarist Mark Tremonti.  In addition to Tremonti, who provides both lead vocals and guitar, the album features rhythm guitarist and backing vocalist Eric Friedman and drummer Garrett Whitlock.  It is the first Tremonti album to feature Wolfgang Van Halen, who replaced Brian Marshall as the band's bassist after the release of the band's first album, "All I Was", in 2012.  "Cauterize" was released on June 9, 2015 in the United States.  The album was set to release in Australia on June 5 but saw an earlier release by a day, thus being released on June 4, 2015.
Answer: Wolfgang Van Halen