He is the second youngest person (after Neil Peart) to be inducted into the "Modern Drummer" Hall of Fame, at 37 years of age. In the spring of 2010, Portnoy filled in for Avenged Sevenfold's former drummer, Jimmy "The Rev" Sullivan, who died during the production of the band's fifth album "Nightmare". On May 5, 2010, Portnoy released a statement on his status with Avenged Sevenfold on their official website, concluding his working relationship with the band On September 8, 2010, Mike Portnoy announced he would be leaving Dream Theater. The band hired Mike Mangini to take his place after inviting and holding auditions with seven "world-class" drummers. When Avenged Sevenfold later decided to also sever ties with Portnoy, he announced that he had asked to return to Dream Theater, but was turned down by their lawyer since the band had already brought Mangini on board, and Mangini had left his tenured teaching position at Berklee College of Music to join the band. 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 and G3. 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. Since his departure, Portnoy has formed several new bands, starting with 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); Sons of Apollo, a progressive metal supergroup also featuring Sheehan, Derek Sherinian, Jeff Scott Soto and Ron "Bumblefoot" Thal; Metal Allegiance, a thrash metal/groove metal band also featuring Mark Menghi, David Ellefson (Megadeth) and Alex Skolnick (Testament); and BPMD, a supergroup/cover band also featuring Menghi, Phil Demmel (Vio-lence) and Bobby "Blitz" Ellsworth (Overkill).