The Intruders were the first group to score hits with the songwriting/production team of Kenny Gamble and Leon Huff, and they  played a major role in the rise of Philadelphia soul, but are forgotten behind better-known acts like the O'Jays or Harold Melvin the Blue Notes. The guys were originally formed as a doo wop group in 1960, and sang around Philadelphia for several years. Lead singer Sam "Little Sonny" Brown, Eugene "Bird" Daughtry, Phil Terry, and Robert "Big Sonny" Edwards signed with Gamble and Huff's fledgling Gamble label in 1966. 
                                                             
They recorded 3 albums and a host of excellent singles..and the success convinced Columbia to front the money for Gamble & Huff to launch what was to be the most successful Soul label in the early 70's..Philadelphia International.
When they recorded the album 'When We Get Married, lead singer "Little Sonny" Brown had been replaced by nightclub singer Bobby Starr (born Robert Ferguson). The title track was a hit on the soul charts, as was the follow-up '(Win, Place or Show) She's a Winner.'   Starr's stay with the group was short-lived;  "Little Sonny" Brown returned for the 1973 album  'Save the Children.' For the 1974 follow-up Energy of Love, the Intruders were switched from Phil. Int. to the subsidiary label TSOP; however, it was less successful than the group's previous releases, and they disbanded in 1975. 
Eugene Daughtry formed a new lineup in 1984 (without any other original members); they recorded an album titled Who Do You Love? for the UK company Streetwave before disbanding once again. Daughtry passed away in 1994 after a bout with cancer, while Brown unfortunately committed suicide following years of drug and alcohol problems.