KMDB

William Sierra

Personal Info

Known For

Acting

Gender

Male

Birthday

11/08/1957

Age

68 years old

Place of Birth

Tampa, Florida, USA

William Sierra

Biography

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. He is well known for the whistle that was almost always hanging around his ... Read More

Known For

The Ref Didn’t See It!

The WRLD on GCW

Barbed Wire City: The Unauthorized Story of Extreme Championship Wrestling

WWE: Undertaker 20-0 - The Streak

WWE: Blood Sport ECW - The Most Violent Matches

ECW: Bloodsport The Most Violent Matches

Hardcore Homecoming

MLW War Games

Filmography

Cast

2025

The Ref Didn’t See It!

as Bill Alfonso

2022

The WRLD on GCW

as Bill Alfonso

2021

Battleground Championship Wrestling

as Bill Alfonso

2019

WrestleCade Supershow 2019

as Bill Alfonso

2013

Barbed Wire City: The Unauthorized Story...

as Himself

2012

WWE: Undertaker 20-0 - The Streak

as Bill Alfonso - Referee (archive footage)

2006

WWE: Blood Sport ECW - The Most Violent ...

2006

ECW: Bloodsport The Most Violent Matche...

as Bill Alfonso

2005

Hardcore Homecoming

as Bill Alfonso (Manager)

2003

MLW War Games

as Bill Alfonso

2003

MLW Rise of The Renegades

2003

MLW Hybrid Hell

as Bill Alfonso (Manager)

2002

WWA The Revolution

as Bill Alfonso

2001

ECW: The Best of Cactus Jack

as Bill Alfonso

2001

MECW Inaugural Show

2001

ECW Hardcore History

as Bill Alfonso (Referee)

2000

ECW Path of Destruction

as Bill Alfonso (Manager)

2000

ECW Anarchy Rulz 2000

as Bill Alfonso (Manager)

2000

ECW Fan Cam: September 9, 2000

as Bill Alfonso (Manager)

2000

ECW Fan Cam: August 25, 2000

as Bill Alfonso (Manager)

2000

ECW: Extreme Evolution

as Bill Alfonso (Manager)

2000

ECW Heat Wave 2000

as Bill Alfonso (Manager)

2000

ECW Fan Cam: June 3, 2000

as Bill Alfonso (Manager)

2000

ECW Living Dangerously 2000

as Bill Alfonso (Appearance)

2000

ECW Fan Cam: January 27, 2000

as Bill Alfonso

2000

ECW Guilty as Charged 2000

as Bill Alfonso (Manager)

1999

ECW Fan Cam: December 17, 1999

as Bill Alfonso (Manager)

1999

ECW November to Remember 1999

as Bill Alfonso (Manager)

1999

ECW Fan Cam: October 23, 1999

as Bill Alfonso (Manager)

1999

ECW Fan Cam: October 15, 1999

as Bill Alfonso (Manager)

1999

ECW Anarchy Rulz 1999

as Bill Alfonso (Manager)

1999

ECW Heat Wave 1999

as Bill Alfonso

1999

ECW Fan Cam: May 29, 1999

as Bill Alfonso (Manager)

1999

ECW Hardcore Heaven 1999

as Bill Alfonso (Manager)

1999

ECW CyberSlam 1999

as Bill Alfonso (Manager)

1999

ECW Living Dangerously 1999

as Bill Alfonso (Manager)

1999

ECW Crossing The Line 1999

as Bill Alfonso

1999

ECW Fan Cam: February 6, 1999

as Bill Alfonso (Manager)

1999

ECW Fan Cam: January 30, 1999

as Bill Alfonso (Manager)

1999

ECW House Party 1999

as Bill Alfonso

1999

ECW Guilty as Charged 1999

as Bill Alfonso

1998

ECW November To Remember 1998

as Bill Alfonso (Manager)

1998

ECW Fan Cam: September 17, 1998

as Bill Alfonso (Manager)

1998

ECW Heat Wave 1998

as Bill Alfonso

1998

ECW A Matter of Respect 1998

as Bill Alfonso (Manager)

1998

ECW It Ain't Seinfeld

as Bill Alfonso (Manager)

1998

ECW Wrestlepalooza 1998

as Bill Alfonso

1998

The Best of Shane Douglas

as Bill Alfonso (Manager)

1998

ECW Fan Cam: March 7, 1998

as Bill Alfonso (Manager)

1998

The Best of The Eliminators

as Bill Alfonso (Manager)

1998

ECW Living Dangerously 1998

as Bill Alfonso

1998

ECW CyberSlam 1998

as Bill Alfonso (Manager)

1998

ECW House Party 1998

as Bill Alfonso

1997

ECW November to Remember 1997

as Bill Alfonso (Manager)

1997

ECW Fan Cam: October 31, 1997

as Bill Alfonso (Manager)

1997

ECW As Good As It Gets

as Bill Alfonso

1997

ECW Hardcore Heaven 1997

as Bill Alfonso (Manager)

1997

ECW Born To Be Wired

as Bill Alfonso

1997

ECW Heat Wave 1997

as Bill Alfonso (Manager)

1997

ECW Wrestlepalooza 1997

as Bill Alfonso (Manager)

1997

ECW Fan Cam: May 16, 1997

as Bill Alfonso (Appearance)

1997

ECW Fan Cam: May 3, 1997

as Bill Alfonso (Manager)

1997

ECW Fan Cam: May 2, 1997 (Barely Legal I...

as Bill Alfonso (Manager)

1997

ECW Barely Legal 1997

as Bill Alfonso (Manager)

1997

ECW Fan Cam: April 4, 1997

as Bill Alfonso (Manager)

1997

ECW Fan Cam: March 22, 1997

as Bill Alfonso (Manager)

1997

ECW Fan Cam: February 14, 1997

as Bill Alfonso (Manager)

1996

ECW Holiday Hell 1996

as Bill Alfonso

1996

ECW Fan Cam: November 23, 1996

as Bill Alfonso (Manager)

1996

ECW November to Remember 1996

as Bill Alfonso

1996

ECW High Incident

as Bill Alfonso (Manager)

1996

ECW Fan Cam: October 18, 1996

as Bill Alfonso (Manager)

1996

ECW Ultimate Jeopardy 1996

as Bill Alfonso

1996

ECW When Worlds Collide 1996

as Bill Alfonso

1996

ECW Natural Born Killaz

as Bill Alfonso (Manager)

1996

ECW The Doctor is In

as Bill Alfonso

1996

ECW Fan Cam: July 28, 1996

as Bill Alfonso

1996

ECW Hardcore Heaven 1996

as Bill Alfonso

1996

ECW A Matter of Respect

as Bill Alfonso (Manager)

1996

ECW Fan Cam: May 10, 1996

as Bill Alfonso (Manager)

1996

ECW Hostile City Showdown 1996

as Bill Alfonso

1996

ECW Massacre on Queens Boulevard

as Bill Alfonso (Manager)

1996

ECW Big Ass Extreme Bash

as Bill Alfonso

1996

ECW Just Another Night

as Bill Alfonso

1996

ECW CyberSlam 1996

as Bill Alfonso

1996

ECW Big Apple Blizzard Blast

as Bill Alfonso

1996

ECW: January 27, 1996

as Bill Alfonso (Appearance)

1996

ECW Extreme Warfare Vol. 2

as Bill Alfonso

1996

ECW House Party 1996

as Bill Alfonso (Manager)

1995

ECW Holiday Hell '95: The New York Invas...

as Bill Alfonso (Manager)

1995

ECW November to Remember 1995

as Bill Alfonso

1995

ECW Fan Cam: September 23, 1995

as Bill Alfonso (Referee)

1995

ECW Gangsta's Paradise

as Bill Alfonso (Troubleshooting Referee)

1995

ECW Sunshine State Slaughter

as Bill Alfonso (Troubleshooting Referee)

1995

ECW Heat Wave 1995

as Bill Alfonso (Troubleshooting Referee)

1995

ECW Hardcore Heaven 1995

as Bill Alfonso (Troubleshooting Referee)

1995

ECW Mountain Top Madness

as Bill Alfonso

1995

ECW Barbed Wire, Hoodies and Chokeslams

as Bill Alfonso (State Appointed Referee)

1995

ECW Enter The Sandman

as Bill Alfonso (Troubleshooting Referee)

1994

Bret "Hit Man" Hart

as Bill Alfonso

1994

WWE Bloopers Bleeps and Bodyslams

as Bill Alfonso

1993

WWE Bashed in the USA

as Bill Alfonso