Mainstream Records was an American record company and independent record label founded by music producer Bob Shad in 1964. Mainstream's early releases were reissues from Commodore Records. Its catalogue grew to include Bob Brookmeyer, Maynard Ferguson, Jim Hall, Helen Merrill, Carmen McRae, Jimmy Raney, Zoot Sims, Clark Terry, and Sarah Vaughan. Janis Joplin, with Big Brother and the Holding Company, first appeared on Mainstream.