John Panozzo, 47, co-founder and drummer of the rock group Styx. Panozzo, his twin brother, Chuck, and vocalist-keyboardist Dennis DeYoung formed Styx in the late 1960s and rode a wave of success that included four consecutive triple-platinum albums from 1977 to 1980. The first, "The Grand Illusion," is now considered one of the seminal art-rock albums of the 1970s. The band's biggest successes came with such songs as "Babe," "Come Sail Away," "Renegade" and "Too Much Time on My Hands." The group broke up in 1984, but reunited, minus vocalist Tommy Shaw, for a comeback tour in 1991. The band is on a 77-date tour this year, but Panozzo had been unable to join because of poor health brought on by chronic alcoholism. On Tuesday in Chicago of gastrointestinal hemorrhage and cirrhosis of the liver.