William Sierra
Actor
Born Aug 11, 1957 · Tampa, Florida, USA
Active 1981–present
William Matthew Sierra is an American former professional wrestling referee and manager better known by his ring name Bill Alfonso. He achieved his greatest success in Extreme Championship Wrestling in the mid-to-late 1990s.
Filmography
GCW: Joey Janela's Spring Break X (2026) — Bill AlfonsoECW Heat Wave 1998 (1998) — Bill AlfonsoECW The Doctor Is In 1996 (1996) — Bill AlfonsoWWE Bloopers Bleeps and Bodyslams (1994) — Bill AlfonsoHardcore Homecoming (2005) — Bill Alfonso (Manager)ECW November to Remember 1995 (1995) — Bill AlfonsoECW CyberSlam 1998 (1998) — Bill Alfonso (Manager)ECW Heat Wave 1999 (1999) — Bill AlfonsoECW November to Remember 1999 (1999) — Bill Alfonso (Manager)WWA The Revolution (2002) — Bill AlfonsoECW House Party 1996 (1996) — Bill Alfonso (Manager)ECW Barely Legal 1997 (1997) — Bill Alfonso (Manager)ECW It Ain't Seinfeld (1998) — Bill Alfonso (Manager)ECW Living Dangerously 1998 (1998) — Bill AlfonsoThe Ref Didn’t See It! (2025) — Bill AlfonsoECW Hardcore History (2001) — Bill Alfonso (Referee)WWE: Blood Sport ECW - The Most Violent Matches (2006)ECW Anarchy Rulz 1999 (1999) — Bill Alfonso (Manager)ECW Guilty as Charged 2000 (2000) — Bill Alfonso (Manager)ECW Hardcore Heaven 1997 (1997) — Bill Alfonso (Manager)ECW As Good As It Gets (1997) — Bill AlfonsoWWF Wrestling Challenge (1986) — Bill AlfonzoECW Big Ass Extreme Bash 1996 (1996) — Bill AlfonsoECW Wrestlepalooza 1998 (1998) — Bill Alfonso