Carl, Al and Matt get the crdit at this Springsteen site :
http://www.springsteenlyrics.com/lyrics/s/summeronsignalhill.php >> When Bruce Springsteen temporary disbanded The E Street Band in 1989, drummer Max Weinberg decided to enter law school, following in his father's career footsteps. "All I had was an advanced degree in Bruce Springsteen music, and the market for used drummers was slim," he said at the time; still, he made it into law school but didn't stay long.
In 1990, Weinberg started his own record label, the New Jersey based Hard Ticket Entertainment. The following year he produced and drummed on the label's first title, Scene Of The Crime, an album by Killer Joe, a New York group Weinberg put together. This was the only album the group ever released, and it featured two rare tracks written by Bruce Springsteen: the instrumental SUMMER ON SIGNAL HILL (only otherwise released by Clarence Clemons in 1983) and CLUB SOUL CITY (only otherwise released by Gary U.S. Bonds in 1982). Scene Of The Crime was released on 08 Oct 1991.
Killer Joe consisted of "Killer" Joe Delia, Max Weinberg, Jimmy Vivino, Haywood Gregory, David Keyes, Mark "Love Man" Pender, Jerry Vivino, Bob Smith, and Erik Lawrence. Their version of SUMMER ON SIGNAL HILL featured a large cast of guests: Liz Mann (flute), Steven Van Zandt (guitar solo), Jon Bon Jovi (acoustic guitar), Branford Marsalis (tenor sax solo), Benmont Tench (Hammond organ), The Beach Boys' Carl Wilson, Al Jardine, and introducing Matt Jardine (vocal harmony), and The Orchestra of St. Luke's under the direction of Julius Rudel.
Max Weinberg's liner notes from the Scene Of The Crime album: "Bruce wrote Summer On Signal Hill which the E Street Band played but never recorded. I always wanted to cut the tune, so the Killer Joe band did, with guest shots from Little Steven, Branford, Jon Bon Jovi, Benmont Tench from Tom Petty's band, the Heartbreakers, the Beach Boys (who I saw for the first time in 1963), and the wonderful musicians of the Orchestra of St. Luke's under the direction of Julius Rudel. This song brought together people from varied musical orientations to benefit the Big Brothers/Big Sisters of America organization. On behalf of the boys and girls and BB/BSA we thank you for your support." <<