He has also played for Ozzy Osbourne, Steve Vai, Paul Rodgers, and GZR, with Black Sabbath's Geezer Butler Deen Castronovo was born in the city of Westminster, California and started drumming at the age of 6.

Wild Dogs is an American rock band from Portland, Oregon formed loosely in 1981 by Jeff Mark, Danny Kurth, Matt McCourt, and Pete Holmes.

Castronovo played on the self-titled debut album Wild Dogs (1983), the followup Man's Best Friend (1984) and Reign Of Terror (1987).

Shortly after, Neal would invite Castronovo to audition for a new band with Jonathan Cain, John Waite and Ricky Phillips, which became Bad English.

Again working with Neal Schon, Castronovo played drums and sang backing vocals on Hardline's debut album Double Eclipse.

After a 3-year stint with Vasco Rossi, he joined Journey, where he would spend the next 18 years and 5 albums as the drummer, backing and occasional lead vocalist.

At the 2004 annual NAMM Show in Los Angeles, Schon met up with Jeff Scott Soto and tested the waters with a jam session.

Inviting Soto, Mendoza and Castronovo to join him, the new band, Soul SirkUS, began rehearsing and eventually recorded 11 songs for their debut album, World Play.

Although all the foundation tracks on the album were originally written for Planet Us, only one completed song from that band was used for Soul SirkUS debut.

In early 2005, with a completed album titled World Play (the "black sleeve" version) the band was ready to tour, but Castronovo fell ill due to extreme exhaustion.

The band, where Deen served as lead vocalist and handled drumming duties, released its self-titled debut album on February 24, 2015.

25 years later, the two were reunited in Italy to commence work on the debut Gioeli-Castronovo album, Set The World On Fire, available July 13, 2018.

Mastermind, Planet Us (a short-lived supergroup with Sammy Hagar, Michael Anthony, Joe Satriani and Neal Schon), Social Distortion, and GZR (formed by Black Sabbath bassist Geezer Butler), as well as in backing bands for Vasco Rossi, Paul Rodgers, and Matthew Ward.

After Ozzy, he began doing session work for producer Michael Beinhorn, recording with Social Distortion, Geezer Butler's solo project and Hole.

He has released an instructional video entitled "High Performance Drumming" in 1991, and has been involved with the Boys & Girls Club of Salem.