The Wrecking Crew, also known as the Clique and the First Call Gang, was a loose collective of American session musicians based in Los Angeles who played on many studio recordings in the 1960s and 1970s, including hundreds of top 40 hits. The musicians, most of whom had formal backgrounds in jazz or classical music, were not publicly recognized at the time but were viewed with reverence by industry insiders. They are now considered one of the most successful and prolific session recording units in history.
The group had no official name in its early years, and when the name the Wrecking Crew was first used is a subject of contention among the musicians. The unit initially coalesced in the early 1960s as the de facto house band for Phil Spector and helped realize his Wall of Sound production style. In 1977, drummer Hal Blaine mentioned the name in an interview, attributing it to older musicians who felt that the group's embrace of rock and roll was going to "wreck" the music industry.
After their work with Spector, they became the most requested session musicians in Los Angeles, playing behind recording artists who included Jan and Dean, Sonny & Cher, the Mamas and the Papas, the Carpenters, Frank Sinatra, and Nancy Sinatra. The musicians were sometimes used as "ghost players" on recordings credited to rock groups, such as the Byrds' debut rendition of Bob Dylan's "Mr.