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William Sierra
Known for: Acting
Born: August 11, 1957
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
MLW War Games
2003
WWE: Undertaker 20-0 - The Streak
2012
The Ref Didn’t See It!
2025
Barbed Wire City: The Unauthorized Story of Extreme Championship Wrestling
2013
ECW Fan Cam: September 23, 1995
1995
Bret "Hit Man" Hart
1994
ECW As Good As It Gets
1997
ECW November to Remember 1995
1995
ECW Extreme Warfare Vol. 2
1996
ECW Fan Cam: January 27, 2000
2000
MECW Inaugural Show
2001
The Best of Shane Douglas
1998
ECW: The Best of Cactus Jack
2001
Battleground Championship Wrestling Presents ECW Reunion Show: A Tribute To The Extreme 2
2024
ECW Just Another Night 1996
1996
MLW Rise of The Renegades
2003
ECW Heat Wave 1997
1997
ECW Path of Destruction
2000
ECW Fan Cam: May 10, 1996
1996
ECW Hostile City Showdown 1996
1996
WWE: Blood Sport ECW - The Most Violent Matches
2006
ECW Hardcore Heaven 1997
1997
ECW Mountain Top Madness
1995
ECW Fan Cam: September 17, 1998
1998
ECW Fan Cam: February 6, 1999
1999
Hardcore Homecoming
2005
ECW: Extreme Evolution
2000
ECW Wrestlepalooza 1998
1998
ECW Holiday Hell 1996
1996
ECW Living Dangerously 1999
1999
Battleground Championship Wrestling
2021
ECW Fan Cam: October 15, 1999
1999
ECW Fan Cam: December 17, 1999
1999
ECW Fan Cam: July 28, 1996
1996
ECW Fan Cam: March 22, 1997
1997
ECW When Worlds Collide 1996
1996
ECW Ultimate Jeopardy 1996
1996
ECW Born To Be Wired
1997
ECW Anarchy Rulz 1999
1999
The WRLD on GCW
2022
ECW Fan Cam: January 30, 1999
1999
ECW: Bloodsport The Most Violent Matches
2006
ECW Fan Cam: November 23, 1996
1996
ECW Barbed Wire, Hoodies and Chokeslams
1995
ECW Crossing The Line 1999
1999
ECW Anarchy Rulz 2000
2000
ECW House Party 1999
1999
ECW Heat Wave 1998
1998
ECW Barely Legal 1997
1997
ECW November to Remember 1997
1997
ECW Heat Wave 1999
1999
ECW Fan Cam: August 25, 2000
2000
ECW Enter the Sandman 1995
1995
ECW It Ain't Seinfeld
1998
ECW House Party 1996
1996
ECW November To Remember 1998
1998
ECW Living Dangerously 1998
1998
MLW Hybrid Hell
2003
ECW Hardcore History
2001
ECW Fan Cam: October 18, 1996
1996
ECW Fan Cam: May 29, 1999
1999
ECW: January 27, 1996
1996
WWE Bloopers Bleeps and Bodyslams
1994
ECW The Doctor Is In 1996
1996
ECW Holiday Hell 1995
1995
ECW Hardcore Heaven 1996
1996
ECW High Incident
1996
ECW Wrestlepalooza 1997
1997
ECW House Party 1998
1998
ECW Hardcore Heaven 1999
1999
WWA The Revolution
2002
ECW Fan Cam: September 9, 2000
2000
ECW A Matter of Respect 1996
1996
ECW Guilty as Charged 1999
1999
ECW CyberSlam 1999
1999
ECW Fan Cam: May 16, 1997
1997
ECW Fan Cam: October 31, 1997
1997
ECW Fan Cam: October 23, 1999
1999
ECW Sunshine State Slaughter
1995
ECW November to Remember 1996
1996
ECW Fan Cam: May 2, 1997 (Barely Legal II)
1997
ECW Heat Wave 1995
1995
ECW Fan Cam: March 7, 1998
1998
ECW A Matter of Respect 1998
1998
ECW November to Remember 1999
1999
ECW Heat Wave 2000
2000
ECW CyberSlam 1996
1996
ECW Fan Cam: June 3, 2000
2000
ECW Hardcore Heaven 1995
1995
ECW Natural Born Killaz
1996
ECW Big Ass Extreme Bash 1996
1996
ECW Fan Cam: April 4, 1997
1997
GCW: Joey Janela's Spring Break X
2026
ECW Guilty as Charged 2000
2000
The Best of The Eliminators
1998
ECW Massacre on Queens BLVD
1996
ECW Gangstas Paradise 1995
1995
ECW Fan Cam: February 14, 1997
1997
WrestleCade Supershow 2019
2019
ECW Fan Cam: May 3, 1997
1997
ECW Big Apple Blizzard Blast
1996
ECW CyberSlam 1998
1998
ECW Living Dangerously 2000
2000
WWE Bashed in the USA
1993
Raw
1993
WWF Wrestling Challenge
1986
Mid-Atlantic Championship Wrestling
1981