That it took Clapton so long to go out on his own, however, was evidence of a degree of reticence unusual for one of his stature. And his debut album, though it spawned the Top 40 hit "After Midnight," was typical of his self-effacing approach: it was, in effect, an album by the group he had lately been featured in, Delaney & Bonnie & Friends. Not surprisingly, before his solo debut had even been released, Clapton had retreated from his solo stance, assembling from the D&B&F ranks the personnel for a group, Derek and the Dominos, with which he played for most of 1970. Clapton was largely inactive in 1971 and 1972, due to heroin addiction, but he performed a comeback concert at the Rainbow Theatre in London on January 13, 1973, resulting in the album Eric Clapton's Rainbow Concert (September 1973). But Clapton did not launch a sustained solo career until July 1974, when he released 461 Ocean Boulevard, which topped the charts and spawned the number one single "I Shot the Sheriff." - music.yahoo.com