Sherinian and Portnoy played together in progressive metal band Dream Theater, from which Sherinian was asked to leave in 1999, while Portnoy later left in 2010. Portnoy, Sheehan, and Sherinian also worked together on a short-lived, live instrumental project with Tony MacAlpinecalled PSMS.
Sheehan and Portnoy formed rock group The Winery Dogs with Sheehan's former Mr. Big bandmate, Richie Kotzen. MMXX (pronounced "2020" ) is the second studio album by American supergroup Sons of Apollo, released on January 17, 2020 via Inside Out Music. It is available as a standard CD package, Limited Edition 2 CD package with instrumental and a cappella versions, 2 LP + CD package, and digital download. Because of this, Portnoy considers MacAlpine to be part of Sons of Apollo's history as well as "part of the extended …