He grew up on the North Shore, where he spent a lot of time watching Joel's Live from Long Island concert video and hanging out in the music room at Miller Place High School where he practiced the songs of Joel, Elton John and Paul McCartney.

[7] He started singing songs of Billy Joel in Miller Place High School's vocal jazz band in the late 1980s.

[11] Byrnes and Joel's drummer since 2005, Chuck Burgi joined regular bassist Nick Dimichino, keyboardist Carmine Giglio and saxophonist John Scarpulla in filling out Big Shot's lineup and DelGuidice continued to sing in concerts.

On August 4, 2015, DelGuidice was the opening act for Joel's closing concert at Long Island's Nassau Veterans Memorial Coliseum in Uniondale.

[16] On July 28, 2016, Big Shot teamed up with the Suffolk County Police Department to raise money through a concert named "Help Stop The Long Island Heroin Epidemic" at the Emporium in Patchogue, New York.

[17] On August 9, 2016, DelGuidice performed the opera classic "Nessun dorma" for the first time with Joel at Madison Square Garden.