Besides his work with Dream Theater, Portnoy is known for his many side projects and tribute bands. He is a founding member of Liquid Tension Experiment, an instrumental progressive rock band featuring fellow Dream Theater members John Petrucci and Jordan Rudess along with bassist Tony Levin. He is also a founding member of Transatlantic, a progressive rock "super-group" featuring former Spock\'s Beard keyboardist/vocalist Neal Morse, Flower Kings guitarist Roine Stolt and Marillion bassist Pete Trewavas. Portnoy has also recorded and/or toured/performed live with Neal Morse, OSI, Hail!, Stone Sour, Fates Warning, Overkill, G3 and played on Avenged Sevenfold\'s album Nightmare in place of their late drummer, The Rev. Over the years, Portnoy has also created tribute bands to The Beatles, Led Zeppelin, Rush, and The Who, which has allowed him to perform the music of his four favorite drummers.\n', '

In September 2010, Portnoy announced his departure from Dream Theater after 25 years. He was replaced by Mike Mangini. Since leaving Dream Theater, Portnoy has formed several new bands. The first, Adrenaline Mob, a traditional heavy metal/hard rock band with singer Russell Allen (of Symphony X) and guitarist Mike Orlando. On June 4, 2013, however, Portnoy announced his departure from Adrenaline Mob, citing scheduling conflicts. He is also a founding member of Flying Colors, a progressive rock band also featuring Steve Morse, Neal Morse, Dave LaRue, and Casey McPherson; The Winery Dogs, a power trio also featuring bassist Billy Sheehan (Mr. Big) and guitarist Richie Kotzen (formerly of Mr. Big and Poison); and Sons of Apollo, a progressive metal supergroup also featuring Sheehan, Derek Sherinian, Jeff Scott Soto and Ron "Bumblefoot" Thal.\n', '

Portnoy was born April 20, 1967 and raised on Long Island in Long Beach, New York. His father, Howard Portnoy, worked as a DJ at a local radio station. Mike and his father later moved to Carmel-by-the-Sea, California to work at KRML radio station after watching the 1971 film "Play Misty for Me". His mother died on November 16, 1984, when the private plane she was riding in, with her boyfriend, crashed off the Atlantic City coastline.\n', '

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