William 'Bill' Church (born 9 December 1946) started out playing bass in a band called Sawbuck in 1969, with Mojo Collins, Starr Donaldson, Ronnie Montrose and Chuck Ruff. As the band was beginning to record their first album, Montrose and Church left Sawbuck to join Van Morrison on his Tupelo Honey album. As Montrose went on to Edgar Winter Group's smash They Only Come Out at Night, Church remained with Morrison and appeared on the Saint Dominic's Preview LP. When Montrose left Winter to form his own hard rock outfit, Montrose, Church was recruited along with singer Sammy Hagar and drummer Denny Carmassi. Church was replaced on the second Montrose album Paper Money by Alan Fitzgerald.
After Hagar left Montrose to start his solo career, Church rejoined the singer for eight studio albums from Nine on a Ten Scale (1976) to VOA (1984) until Hagar left to front Van Halen.
Nicknamed "Electric Church," along with Ronnie Montrose and Denny Carmassi, had a "Montrose reunion" on Hagar's Marching To Mars CD (1997) on the song "Leaving The Warmth of the Womb."
- Bill Church’s son, Trevor, plays guitar in the rock band An Angle.
- Bill is currently in [the DHC band] (Davis,Hodge,Church) with Tom Davis and Perry Hodge
One more album - Sammy Hagar's Best of Sammy Hagar 1992.