In the period of 1968-69, the band did nightclubs in Los Angeles and Hollywood as the Mike James Quintet. The quintet's members were all former Invaders; Mike Aversa, Simon Casas, Barry Ward, John Ortiz, and Mario Sosa. Their most memorable night club gig was at The Factory in Beverly Hills, a major Hollywood celebrity hang out. The directors of The Factory were Peter Lawford, Sammy Davis Jr., and Paul Newman. During the Mike James Quintet's run they entertained and provided dance music for luminaries such as James Mason, Omar Sharif, Martha Raye, Dick Smothers, Barbara Feldon, Barbara Eden, Ricky Nelson, and Hugh Hefner.
In 1969, Dick Biondi lost his job at KRLA and moved on to a rock station in the South. He kindly turned Mickey & the Invaders over to a couple of other KRLA DJs who became their managers, Charlie O'Donnell and Humble Harve (Harvey Miller). Their new managers helped secure a major record deal for the band with MCA Records. Their managers also gave them a new name for their new deal, Dyna-Might! Band members at this time were Mickey Aversa, Simon Casas, Barry Ward, John Ortiz, Mario Sosa, and Nick Bradley (keyboards). Bradley was in the band for about a year. Their first single was on the label's Congress subsidiary. "You Got Me Groovin" and "Soul Has No Color" were released on January 1, 1970. Their second single was "Borracho" and "Need You" released September 1, 1970 on MCA's Uni label. On "Borracho" the prominent Hammond B3 organ is played by saxophonist John Ortiz, who was now playing some keyboard in the band. Their third single was "Sunshine Goddess," written by Alan O'Day, and "Message To My Brother."
As Dyna-Might they were also the house band at Magic Mountain amusement park in Valencia for their opening season in 1971. It was there they were on the bill with performers such as comedienne Phyllis Diller, impressionist Rich Little, and the great singer, Bobby Darin. They also did "live" shows for Wolfman Jack, backed Freddy Cannon on a record ("Rock & Roll ABCs" written by Alan O'Day and "Superman" written by Mickey Aversa), and appeared on The Real Don Steel's dance TV show. Other guests on that show were the Ides of March of "Vehicle" fame and the great Little Richard. Dyna-Might also played clubs in the Western U.S. and in Canada.