William Sierra
Known for Acting · 107 credits
- Born
- 1957-08-11 (age 68)
- Place of birth
- Tampa, Florida, USA
- Also known as
- Bill Alfonso
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 many ECW fans with strict enforcement of the rules and disqualifications of wrestlers for such ECW traditions as using steel chairs as weapons.n this role, he engaged in a feud with ECW founder Tod Gordon that resulted in several wrestling matches.
Since the closing of ECW, Alfonso has appeared in several independent promotions. He worked one match in Xtreme Pro Wrestling as a referee. He has also worked in Elite Wrestling Entertainment as a referee and a manager,as well as managing wrestlers in Squared Circle Wrestling and Pro Wrestling Unplugged.In May 2007, he made his first appearance with Women's Extreme Wrestling, where he serves as a manager and as commissioner.
On August 8, 2010, Alfonso took part in Total Nonstop Action Wrestling's ECW reunion show, Hardcore Justice, managing both Rob Van Dam and Sabu during their match against each other. On the following edition of TNA Impact!, the ECW alumni, known collectively as Extreme, Version 2.0 (EV 2.0), were assaulted by A.J. Styles, Kazarian, Robert Roode, James Storm, Douglas Williams and Matt Morgan of Ric Flair's Fourtune stable, who thought they didn't deserve to be in TNA.
In October 2002, fellow manager Missy Hyatt sued Alfonso in a case televised on Judge Mathis. She accused Alfonso of damaging her Porsche and was awarded $500.
Alfonso is not the only person in his family to have a career in the Professional Wrestling sport, his step brother, former Olympian Bob Roop also spent many years as a wrestler fighting all over the world under a variety of names and gimmicks while his cousin David Sierra has also enjoyed a long career in the ring including a stint in WCW as Fidel Sierra where he is remembered for a controversial feud with Hacksaw Jim Duggan. However, contrary to popular belief, Alfonso is not related to Mike Awesome with whom he spent time with in ECW. The confusion is thought to have stemmed from the fact that Awesome's real surname was Alfonso and the fact that he wrestled in Japan as The Gladiator, a name that Alfonso's real brother Bob Roop also used during his career.
Known For
Raw
1993
as Bill Alfonso
WWF Wrestling Challenge
1986
as Bill Alfonzo
Mid-Atlantic Championship Wrestling
1981
as Bill Alfonso (Referee)
ECW: Bloodsport The Most Violent Matches
2006
as Bill Alfonso
WWE: Undertaker 20-0 - The Streak
2012
as Bill Alfonso - Referee (archive footage)
Bret "Hit Man" Hart
1994
as Bill Alfonso
TV Shows (3)
Movies (104)
ECW: Bloodsport The Most Violent Matches
2006
as Bill Alfonso
WWE: Undertaker 20-0 - The Streak
2012
as Bill Alfonso - Referee (archive footage)
Bret "Hit Man" Hart
1994
as Bill Alfonso
ECW Just Another Night 1996
1996
as Bill Alfonso
ECW Barely Legal 1997
1997
as Bill Alfonso (Manager)
ECW Wrestlepalooza 1998
1998
as Bill Alfonso
ECW Living Dangerously 2000
2000
as Bill Alfonso
WWE Bashed in the USA
1993
as Bill Alfonso
ECW Barbed Wire, Hoodies and Chokeslams
1995
as Bill Alfonso (State Appointed Referee)
ECW: January 27, 1996
1996
as Bill Alfonso (Appearance)
ECW House Party 1996
1996
as Bill Alfonso (Manager)
ECW November to Remember 1995
1995
as Bill Alfonso
Hardcore Homecoming
2005
as Bill Alfonso (Manager)
ECW The Doctor Is In 1996
1996
as Bill Alfonso
ECW Hardcore Heaven 1997
1997
as Bill Alfonso (Manager)
ECW Massacre on Queens BLVD
1996
as Bill Alfonso (Manager)
WWE Bloopers Bleeps and Bodyslams
1994
as Bill Alfonso
ECW House Party 1998
1998
as Bill Alfonso
ECW Born To Be Wired
1997
as Bill Alfonso
ECW Heat Wave 1995
1995
as Bill Alfonso (Troubleshooting Referee)
ECW Wrestlepalooza 1997
1997
as Bill Alfonso (Manager)
ECW Living Dangerously 1998
1998
as Bill Alfonso
ECW CyberSlam 1996
1996
as Bill Alfonso
ECW November to Remember 1999
1999
as Bill Alfonso (Manager)
ECW Heat Wave 1999
1999
as Bill Alfonso
ECW A Matter of Respect 1998
1998
as Bill Alfonso (Manager)
ECW Big Ass Extreme Bash 1996
1996
as Bill Alfonso
WrestleCade Supershow 2019
2019
as Bill Alfonso
ECW Fan Cam: May 3, 1997
1997
as Bill Alfonso (Manager)
ECW Ultimate Jeopardy 1996
1996
as Bill Alfonso
ECW A Matter of Respect 1996
1996
as Bill Alfonso (Manager)
MLW War Games
2003
as Bill Alfonso
ECW Heat Wave 1998
1998
as Bill Alfonso
ECW: The Best of Cactus Jack
2001
as Bill Alfonso
ECW Hostile City Showdown 1996
1996
as Bill Alfonso
ECW High Incident
1996
as Bill Alfonso (Manager)
ECW Anarchy Rulz 1999
1999
as Bill Alfonso (Manager)
ECW November To Remember 1998
1998
as Bill Alfonso (Manager)
ECW Living Dangerously 1999
1999
as Bill Alfonso (Manager)
ECW Mountain Top Madness
1995
as Bill Alfonso
ECW Fan Cam: May 2, 1997 (Barely Legal II)
1997
as Bill Alfonso (Manager)
ECW House Party 1999
1999
as Bill Alfonso
ECW Fan Cam: February 14, 1997
1997
as Bill Alfonso (Manager)
ECW Fan Cam: November 23, 1996
1996
as Bill Alfonso (Manager)
ECW Anarchy Rulz 2000
2000
as Bill Alfonso (Manager)
The Best of Shane Douglas
1998
as Bill Alfonso (Manager)
Barbed Wire City: The Unauthorized Story of Extreme Championship Wrestling
2013
as Himself
WWA The Revolution
2002
as Bill Alfonso
ECW Holiday Hell 1995
1995
as Bill Alfonso (Manager)
ECW Path of Destruction
2000
as Bill Alfonso (Manager)
ECW When Worlds Collide 1996
1996
as Bill Alfonso
ECW Enter the Sandman 1995
1995
as Bill Alfonso (Troubleshooting Referee)
The WRLD on GCW
2022
as Bill Alfonso
ECW Fan Cam: July 28, 1996
1996
as Bill Alfonso
WWE: Blood Sport ECW - The Most Violent Matches
2006
ECW Big Apple Blizzard Blast
1996
as Bill Alfonso
ECW Hardcore Heaven 1995
1995
as Bill Alfonso (Troubleshooting Referee)
ECW Fan Cam: May 10, 1996
1996
as Bill Alfonso (Manager)
ECW Hardcore History
2001
as Bill Alfonso (Referee)
ECW November to Remember 1996
1996
as Bill Alfonso
ECW Holiday Hell 1996
1996
as Bill Alfonso
ECW CyberSlam 1998
1998
as Bill Alfonso (Manager)
The Best of The Eliminators
1998
as Bill Alfonso (Manager)
ECW Guilty as Charged 1999
1999
as Bill Alfonso
Battleground Championship Wrestling
2021
as Bill Alfonso
ECW Fan Cam: October 15, 1999
1999
as Bill Alfonso (Manager)
ECW Fan Cam: December 17, 1999
1999
as Bill Alfonso (Manager)
MLW Rise of The Renegades
2003
ECW CyberSlam 1999
1999
as Bill Alfonso (Manager)
ECW Fan Cam: October 23, 1999
1999
as Bill Alfonso (Manager)
ECW Crossing The Line 1999
1999
as Bill Alfonso
ECW Heat Wave 2000
2000
as Bill Alfonso (Manager)
ECW Fan Cam: May 29, 1999
1999
as Bill Alfonso (Manager)
ECW Extreme Warfare Vol. 2
1996
as Bill Alfonso
ECW Fan Cam: January 30, 1999
1999
as Bill Alfonso (Manager)
ECW Fan Cam: January 27, 2000
2000
as Bill Alfonso
ECW Hardcore Heaven 1996
1996
as Bill Alfonso
ECW November to Remember 1997
1997
as Bill Alfonso (Manager)
ECW Heat Wave 1997
1997
as Bill Alfonso (Manager)
ECW Fan Cam: October 31, 1997
1997
as Bill Alfonso (Manager)
ECW Fan Cam: May 16, 1997
1997
as Bill Alfonso (Appearance)
ECW Gangstas Paradise 1995
1995
as Bill Alfonso (Troubleshooting Referee)
ECW Fan Cam: September 9, 2000
2000
as Bill Alfonso (Manager)
ECW Fan Cam: September 23, 1995
1995
as Bill Alfonso (Referee)
The Ref Didn’t See It!
2025
as Bill Alfonso
ECW Sunshine State Slaughter
1995
as Bill Alfonso (Troubleshooting Referee)
ECW As Good As It Gets
1997
as Bill Alfonso
ECW Hardcore Heaven 1999
1999
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)
MLW Hybrid Hell
2003
as Bill Alfonso (Manager)
ECW Fan Cam: February 6, 1999
1999
as Bill Alfonso (Manager)
ECW It Ain't Seinfeld
1998
as Bill Alfonso (Manager)
ECW Fan Cam: April 4, 1997
1997
as Bill Alfonso (Manager)
ECW Natural Born Killaz
1996
as Bill Alfonso (Manager)
ECW Fan Cam: June 3, 2000
2000
as Bill Alfonso (Manager)
ECW Guilty as Charged 2000
2000
as Bill Alfonso (Manager)
ECW Fan Cam: October 18, 1996
1996
as Bill Alfonso (Manager)
ECW: Extreme Evolution
2000
as Bill Alfonso (Manager)
GCW: Joey Janela's Spring Break X
2026
as Bill Alfonso
ECW Fan Cam: March 22, 1997
1997
as Bill Alfonso (Manager)
ECW Fan Cam: August 25, 2000
2000
as Bill Alfonso (Manager)
Battleground Championship Wrestling Presents ECW Reunion Show: A Tribute To The Extreme 2
2024
as Bill Alfonso
MECW Inaugural Show
2001
About William Sierra
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 many ECW fans with strict enforcement of the rules… With 107 credits spanning from 1981 to 2026, William Sierra has appeared in 104 films and 3 TV shows.
Fans searching for William Sierra movies, William Sierra filmography, or the latest projects starring William Sierra can stream many of these titles on Bowood.TV, free and in HD, with no subscription required.
Most Popular William Sierra Movies
- ECW: Bloodsport The Most Violent Matches (2006) — as Bill Alfonso
- WWE: Undertaker 20-0 - The Streak (2012) — as Bill Alfonso - Referee (archive footage)
- Bret "Hit Man" Hart (1994) — as Bill Alfonso
- ECW Just Another Night 1996 (1996) — as Bill Alfonso
- ECW Barely Legal 1997 (1997) — as Bill Alfonso (Manager)
Where to Watch William Sierra Films
Most William Sierra movies and series are available to stream on Bowood.TV in full HD, completely free and without signup. Browse the complete filmography above to jump directly to any title. For more films and the latest web series featuring William Sierra, check our movies catalogue and browse page.