Initially the group were formed in Chicago though their early vocal mainstays, Little Artie Herrera and his brother Big Al Herrera, had started out as members of Milwaukee's Little Artie and the Pharaohs. The Mob moved on from the Windy City and cut loads of further tracks in the New York / east coast area. They gigged all over the US, playing dates as far apart as Florida, New York and Milwaukee. Eventually they broke up around 1980. 　　The mid-1960s found the Herrera brothers in Chicago where they joined up with Jim Holvay (aka Jimmy Soul) and Gary Beisbier (who co-wrote hits for The Buckinghams), Jimmy Ford, Tony Nedza, Bobby Ruffino and Mike Sistak. Artie was drafted, exchanging life as a musician for a tour of Vietnam. With Al handling lead vocals as The Mob, the group became one of the first horn-rock outfits in Chicago where they released a series of singles over the next couple of years: 　　-1966's 'Wait' b/w 'Mystery Man' (Cameo catalog number C-421) 　　-1968's 'Unbelievable' b/w 'Try a Little Tenderness (Twinight catalog 111) 　　-1966's Open the Door To Your Heart' b/w 'I Wish You'd Leave Me Alone' (Daylight catalog 1000) 　　-1968's 'Disappear' b/w 'I Wish You Would Leave Me Alone' (Mercury catalog number 72791)