William Sierra

Actor Aug 11 (age 68) Tampa, Florida, USA 1981–2025 (44 year career)

6.6 avg rating

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 neck, which he blew constantly during his wrestlers' matches In May 1995, he made his debut in Extreme Championship Wrestling as a "trouble-shooting referee".Introduced by Shane Douglas, he angered ma…

Known For

Film

WWE: Undertaker 20-0 - The Streak

Bill Alfonso - Referee (archive footage)

Film

ECW Heat Wave 1998

Bill Alfonso

Film

ECW Barely Legal 1997

Bill Alfonso (Manager)

Film

ECW House Party 1996

Bill Alfonso (Manager)

Film

Raw

Bill Alfonso

Film

ECW Heat Wave 2000

Bill Alfonso (Manager)

Film

ECW The Doctor Is In 1996

Bill Alfonso

Film

Barbed Wire City: The Unauthorized Story of Extreme Championship Wrestling

Himself

Filmography

Acting (105)

Movies (102)

The Ref Didn’t See It!

2025

as Bill Alfonso

9.0

The WRLD on GCW

2022

as Bill Alfonso

Battleground Championship Wrestling

2021

as Bill Alfonso

WrestleCade Supershow 2019

2019

as Bill Alfonso

Barbed Wire City: The Unauthorized Story of Extreme Championship Wrestling

2013

as Himself

8.0

WWE: Undertaker 20-0 - The Streak

2012

as Bill Alfonso - Referee (archive footage)

8.8

ECW: Bloodsport The Most Violent Matches

2006

as Bill Alfonso

WWE: Blood Sport ECW - The Most Violent Matches

2006

8.0

Hardcore Homecoming

2005

as Bill Alfonso (Manager)

MLW Hybrid Hell

2003

as Bill Alfonso (Manager)

MLW War Games

2003

as Bill Alfonso

MLW Rise of The Renegades

2003

WWA The Revolution

2002

as Bill Alfonso

ECW: The Best of Cactus Jack

as Bill Alfonso

MECW Inaugural Show

ECW Hardcore History

as Bill Alfonso (Referee)

7.5

ECW Anarchy Rulz 2000

2000

as Bill Alfonso (Manager)

ECW: Extreme Evolution

2000

as Bill Alfonso (Manager)

ECW Heat Wave 2000

2000

as Bill Alfonso (Manager)

5.2

ECW Guilty as Charged 2000

2000

as Bill Alfonso (Manager)

8.0

ECW Fan Cam: January 27, 2000

2000

as Bill Alfonso

ECW Fan Cam: August 25, 2000

2000

as Bill Alfonso (Manager)

ECW Living Dangerously 2000

2000

as Bill Alfonso

ECW Path of Destruction

2000

as Bill Alfonso (Manager)

ECW Fan Cam: September 9, 2000

2000

as Bill Alfonso (Manager)

ECW Fan Cam: June 3, 2000

2000

as Bill Alfonso (Manager)

ECW Guilty as Charged 1999

1999

as Bill Alfonso

5.0

ECW Anarchy Rulz 1999

1999

as Bill Alfonso (Manager)

6.0

ECW CyberSlam 1999

1999

as Bill Alfonso (Manager)

ECW Crossing The Line 1999

1999

as Bill Alfonso

ECW Living Dangerously 1999

1999

as Bill Alfonso (Manager)

ECW November to Remember 1999

1999

as Bill Alfonso (Manager)

10.0

ECW Fan Cam: May 29, 1999

1999

as Bill Alfonso (Manager)

ECW Heat Wave 1999

1999

as Bill Alfonso

10.0

ECW Fan Cam: October 15, 1999

1999

as Bill Alfonso (Manager)

ECW Hardcore Heaven 1999

1999

as Bill Alfonso (Manager)

1.0

ECW House Party 1999

1999

as Bill Alfonso

ECW Fan Cam: February 6, 1999

1999

as Bill Alfonso (Manager)

ECW Fan Cam: October 23, 1999

1999

as Bill Alfonso (Manager)

ECW Fan Cam: December 17, 1999

1999

as Bill Alfonso (Manager)

ECW Fan Cam: January 30, 1999

1999

as Bill Alfonso (Manager)

ECW House Party 1998

1998

as Bill Alfonso

7.0

ECW CyberSlam 1998

1998

as Bill Alfonso (Manager)

10.0

ECW Living Dangerously 1998

1998

as Bill Alfonso

ECW November To Remember 1998

1998

as Bill Alfonso (Manager)

The Best of The Eliminators

1998

as Bill Alfonso (Manager)

ECW Fan Cam: March 7, 1998

1998

as Bill Alfonso (Manager)

ECW Fan Cam: September 17, 1998

1998

as Bill Alfonso (Manager)

ECW Heat Wave 1998

1998

as Bill Alfonso

10.0

ECW Wrestlepalooza 1998

1998

as Bill Alfonso

ECW It Ain't Seinfeld

1998

as Bill Alfonso (Manager)

ECW A Matter of Respect 1998

1998

as Bill Alfonso (Manager)

The Best of Shane Douglas

1998

as Bill Alfonso (Manager)

ECW Barely Legal 1997

1997

as Bill Alfonso (Manager)

8.0

ECW Wrestlepalooza 1997

1997

as Bill Alfonso (Manager)

ECW Fan Cam: May 16, 1997

1997

as Bill Alfonso (Appearance)

ECW Fan Cam: March 22, 1997

1997

as Bill Alfonso (Manager)

ECW Hardcore Heaven 1997

1997

as Bill Alfonso (Manager)

ECW Fan Cam: May 3, 1997

1997

as Bill Alfonso (Manager)

ECW Fan Cam: April 4, 1997

1997

as Bill Alfonso (Manager)

ECW Heat Wave 1997

1997

as Bill Alfonso (Manager)

ECW Born To Be Wired

1997

as Bill Alfonso

ECW Fan Cam: October 31, 1997

1997

as Bill Alfonso (Manager)

ECW November to Remember 1997

1997

as Bill Alfonso (Manager)

2.7

ECW As Good As It Gets

1997

as Bill Alfonso

8.0

ECW Fan Cam: February 14, 1997

1997

as Bill Alfonso (Manager)

ECW Fan Cam: May 2, 1997 (Barely Legal II)

1997

as Bill Alfonso (Manager)

ECW November to Remember 1996

1996

as Bill Alfonso

2.3

ECW High Incident

1996

as Bill Alfonso (Manager)

ECW Massacre on Queens BLVD

1996

as Bill Alfonso (Manager)

ECW Holiday Hell 1996

1996

as Bill Alfonso

1.0

ECW A Matter of Respect 1996

1996

as Bill Alfonso (Manager)

ECW Fan Cam: November 23, 1996

1996

as Bill Alfonso (Manager)

ECW Ultimate Jeopardy 1996

1996

as Bill Alfonso

ECW CyberSlam 1996

1996

as Bill Alfonso

ECW: January 27, 1996

1996

as Bill Alfonso (Appearance)

ECW Fan Cam: May 10, 1996

1996

as Bill Alfonso (Manager)

ECW Big Ass Extreme Bash 1996

1996

as Bill Alfonso

6.8

ECW Extreme Warfare Vol. 2

1996

as Bill Alfonso

ECW Just Another Night 1996

1996

as Bill Alfonso

ECW The Doctor Is In 1996

1996

as Bill Alfonso

10.0

ECW Big Apple Blizzard Blast

1996

as Bill Alfonso

6.0

ECW Natural Born Killaz

1996

as Bill Alfonso (Manager)

ECW House Party 1996

1996

as Bill Alfonso (Manager)

9.0

ECW Hostile City Showdown 1996

1996

as Bill Alfonso

1.0

ECW Hardcore Heaven 1996

1996

as Bill Alfonso

6.0

ECW Fan Cam: October 18, 1996

1996

as Bill Alfonso (Manager)

ECW When Worlds Collide 1996

1996

as Bill Alfonso

ECW Fan Cam: July 28, 1996

1996

as Bill Alfonso

ECW Mountain Top Madness

1995

as Bill Alfonso

5.0

ECW Enter the Sandman 1995

1995

as Bill Alfonso (Troubleshooting Referee)

6.0

ECW Sunshine State Slaughter

1995

as Bill Alfonso (Troubleshooting Referee)

ECW Gangstas Paradise 1995

1995

as Bill Alfonso (Troubleshooting Referee)

ECW Holiday Hell 1995

1995

as Bill Alfonso (Manager)

ECW Fan Cam: September 23, 1995

1995

as Bill Alfonso (Referee)

ECW Hardcore Heaven 1995

1995

as Bill Alfonso (Troubleshooting Referee)

6.0

ECW Barbed Wire, Hoodies and Chokeslams

1995

as Bill Alfonso (State Appointed Referee)

ECW November to Remember 1995

1995

as Bill Alfonso

10.0

ECW Heat Wave 1995

1995

as Bill Alfonso (Troubleshooting Referee)

WWE Bloopers Bleeps and Bodyslams

1994

as Bill Alfonso

10.0

Bret "Hit Man" Hart

1994

as Bill Alfonso

WWE Bashed in the USA

1993

as Bill Alfonso

Television (3)

Raw

1993

as Bill Alfonso

6.8

WWF Wrestling Challenge

1986

as Bill Alfonzo

6.8

Mid-Atlantic Championship Wrestling

1981

as Bill Alfonso (Referee)