He made the instrumental solo album Perpetual Burn in 1988. In 1989, he left Cacophony and was hired by David Lee Roth to replace Steve Vai in his backup band, appearing on the album A Little Ain't Enough (1991). Shortly after he joined Roth's band, however, he was diagnosed with Amyotrophic Lateral Sclerosis (ALS), better known as Lou Gehrig's disease, a rare degenerative illness that causes paralysis. Nevertheless, he succeeded in completing a second solo album, Perspective, released on his own label in 1996. Raspberry Jams, an album of demos, followed in 1999, and in 2001, through the intercession of Eddie Van Halen, Perspective was given major-label release on Warner Bros. Records. ~ William Ruhlmann