Logan was born in Buenos Aires, Argentina, immigrating as a child to the United States. Logan got his start as lead vocalist for the band Diamond Rose in South Florida from 1985 to 1987. That band consisted of Dave Rhodes (guitar), Mike D\'Amico (drums), Marc Wolpert (bass), and Mark "Smitty" Smith (guitar). The band became well-known in South Florida, but Oni left to join another Florida band by the name of Defiance. After a year of performing with them, he was invited to Los Angeles by Marc Ferrari (guitarist of Keel) to become the singer for his new band Ferrari. At the same time Ferrari was starting to form, he was asked to join the band Racer X in a new incarnation featuring all original band members except star guitarist Paul Gilbert, who had at that point left the band to form the band Mr. Big. However, Logan had only performed one show with the band when the members decided to go their separate ways. A year after, he was courted by George Lynch, who had recently left the band Dokken with drummer Mick Brown to form the band Lynch Mob.\n', 'In 1990, Lynch Mob released their first album Wicked Sensation, which featured Logan on lead vocals. However, shortly after finishing touring, Logan and band decided to part ways. His replacement was a new singer by the name of Robert Mason. Why Logan and the band parted ways is still unknown to the public.\n', 'Upon leaving the Lynch Mob, there was a deal waiting for Logan with Atlantic Records. Logan formed the band Violets Demise with former Dio guitarist Rowan Robertson, a young 21-year-old Scot Coogan, and well-known bassist Spencer Campbell. The group recorded their first album with the renowned producer Dave Jerden, but it never saw the light of day because of changed personnel in the record company. Recently, the unreleased Violets Demise album began circulating on the Internet and has since become a popular bootleg. In 2001, album was self-released under the name Logan/Robertson, titled Revisited.\n', '

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