Gruberj has 4 The Offspring concerts.

The Offspring is a punk rock band formed in Huntington Beach, California, United States in 1984. From 1987 to 2003, the band's line-up included Dexter Holland (lead vocals, guitar), Noodles (lead and rhythm guitars, back vocals), Greg K. (bass, back vocals), and Ron Welty (drums, percussion), who was fired in 2003. Their current drummer, Brandon Pertzborn, has been with the band since 2023. Greg K was fired from the band in 2018 and was replaced by Todd Morse.