The group had its first hit almost immediately late in 1968 with "Not on the Outside", which reached No. 13 on the R&B chart and No. 57 on the Billboard Hot 100 (with Greene on lead vocal).
The band's first notable achievement occurred almost immediately towards the end of 1968 with "Not on the Outside", which reached a high position on both the R&B chart at No. 13 and the Billboard Hot 100 at No. 57, thanks to Greene's prominent vocals.