Alan Fitzgerald, U.S. musician (both a bassist and a keyboardist), was a member of several U.S. bands.

He played as a bassist in the bands Montrose

Montrose (band)

Montrose was a California-based hard rock band. The band originally featured Ronnie Montrose on guitar and future solo artist and former Van Halen frontman Sammy Hagar...

 and Gamma

Gamma (band)

Gamma was a band formed by guitarist Ronnie Montrose and singer Davey Pattison in San Francisco in 1979. They released four albums: Gamma 1 in 1979, Gamma 2 in 1980, Gamma 3 in 1982 and Gamma 4 in 2000...

, both of which also featured guitarist Ronnie Montrose

Ronnie Montrose

Ronnie Montrose, is an Amercian rock guitarist who has headed his own bands as well as performing with a variety of musicians, including Sammy Hagar, Herbie Hancock, Van Morrison, The Beau Brummels, Boz Scaggs, Beaver & Krause, Gary Wright, Tony Williams, The Neville Brothers, Dan Hartman, Edgar...

.

He played keyboards for Sammy Hagar as a solo artist.

In the 1980s, he was the keyboardist for Night Ranger

Night Ranger

Night Ranger is an American rock band from San Francisco that gained popularity during the 1980s with a series of albums and singles. The band's first five albums sold more than 10 million copies worldwide...

. He also played keyboards offstage for Van Halen tours in the early 90s and in 2004.

His father, George Fitzgerald, was a jazz musician and music teacher in Salisbury, MD. His younger brother, Mark, played bass on the Charlie Daniels Band album Fire on the Mountain

Fire on the Mountain (album)

Fire on the Mountain is a 1974 album by Charlie Daniels appearing on the record label Kama Sutra Records, then later in 1976 by Capitol Records...

.

Sammy Hagar

• Nine on a Ten Scale
  Nine on a Ten Scale
  Nine on a Ten Scale is Sammy Hagar's first solo album.- Song information :* "Keep On Rockin'", a Hagar original, was covered by Bette Midler on the classic soundtrack to The Rose, albeit in a vastly different version....
  
  (1976)
• Sammy Hagar (1977)

Night Ranger

• Dawn Patrol
  Dawn Patrol
  Dawn Patrol is the debut album by Night Ranger released in 1982. The band was named Ranger during the recording of the album. The first issues of the album were printed and ready to be shipped when it was discovered that there was a country band from California with the same name...
  
  (1982)
• Midnight Madness
  Midnight Madness (album)
  Midnight Madness is the second album from Night Ranger. The album contained the band's best known hit, "Sister Christian", and became the band's highest selling album, selling well over a million copies in the US.-Track listing:...
  
  (1983)
• 7 Wishes
  Seven Wishes
  Seven Wishes is the third studio album by the band Night Ranger, released in 1985 and produced by Pat Glasser.The title of "Four in the Morning " describes the time of day Jack Blades wrote the song. In an interview with the Songfacts website, he explained, "Literally, I wrote that song at 4 in the...
  
  (1985)
• Big Life
  Big Life (Night Ranger album)
  Big Life is the fourth studio album by Night Ranger, released in 1987. It featured the single "The Secret of My Success", which was written for the 1987 film of the same name starring Michael J. Fox. The single flopped, stalling outside the Top 40, peaking at #64...
  
  (1987)
• Greatest Hits (1989)
• Neverland
  Neverland (Night Ranger album)
  Neverland is the seventh studio album by Night Ranger, released on July 22, 1997. This album featured a reunion of all five original bandmembers, and was their first time they recorded together in a decade...
  
  (1997)
• Live In Japan '97 (1997)
• Seven
  Seven (Night Ranger album)
  Seven is the eighth studio album by Night Ranger, released on July 14, 1998. All original members are present on this follow-up to 1997's Neverland.Tommy Shaw of Styx fame co-wrote the track "Kong" with Jack Blades.Two singles were released...
  
  (1998)
• Live In Japan: Greatest Hits Live (1998)