Michael Anthony Sobolewski (born June 20, 1954) is an American musician who was the bassist and backing vocalist for the hard rock band Van Halen from 1974 to 2006. He performed on Van Halen's first 11 albums and was their longest-tenured bassist. Following his 2006 departure, Anthony has collaborated with fellow former Van Halen bandmate Sammy Hagar for the supergroups Chickenfoot and Sammy Hagar and the Circle. In addition to his music career, he markets a line of hot sauces named Mad Anthony and related products. Anthony was inducted to the Rock and Roll Hall of Fame as a member of Van Halen in 2007.