Castronovo is the former drummer for the band Journey and current for Revolution Saints, performing on Journey albums such as Arrival (2001), Red 13 (2002), Generations (2005) (in which he also provided lead vocals on two songs), Revelation (2008), and Eclipse (2011), as well as providing lead vocals when performing live Journey hits such as "Mother, Father", "Still They Ride", and "Keep on Runnin'", and occasionally "Faithfully".
He also played on the song "Smoke Of The Revolution" on the Neal Schon solo album Late Nite (1989).
Castronovo was arrested on June 14, 2015 and charged with fourth-degree assault and menacing after police say he physically injured a woman. As a result, he has been dropped from several upcoming Journey performances. He was replaced by Omar Hakim on the 2015 tour. On June 29, 2015, Castronovo was indicted by a Marion County grand jury. He faces felony charges of rape, assault, sexual abuse, unlawful use of a dangerous weapon, and contempt of court (violation of terms of bail after the June 14 arrest).