William Sierra
Profile info
Known forActing
GenderMale
Birthday11 August 1957 (69 years old)
Place of birthTampa, Florida, USA
Known credits107
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 tra…
GCW: Joey Janela's Spring Break X
2026 · Bill Alfonso
The Ref Didn’t See It!
2025 · Bill Alfonso
Battleground Championship Wrestling Presents ECW Reunion Show: A Tribute To The Extreme 2
2024 · Bill Alfonso
The WRLD on GCW
2022 · Bill Alfonso
Battleground Championship Wrestling
2021 · Bill Alfonso
WrestleCade Supershow 2019
2019 · Bill Alfonso
Barbed Wire City: The Unauthorized Story of Extreme Championship Wrestling
2013 · Himself
WWE: Undertaker 20-0 - The Streak
2012 · Bill Alfonso - Referee (archive footage)
WWE: Blood Sport ECW - The Most Violent Matches
2006
ECW: Bloodsport The Most Violent Matches
2006 · Bill Alfonso
Hardcore Homecoming
2005 · Bill Alfonso (Manager)
MLW War Games
2003 · Bill Alfonso
MLW Rise of The Renegades
2003
MLW Hybrid Hell
2003 · Bill Alfonso (Manager)
WWA The Revolution
2002 · Bill Alfonso
ECW: The Best of Cactus Jack
2001 · Bill Alfonso
MECW Inaugural Show
2001
ECW Hardcore History
2001 · Bill Alfonso (Referee)
ECW Path of Destruction
2000 · Bill Alfonso (Manager)
ECW Anarchy Rulz 2000
2000 · Bill Alfonso (Manager)
ECW Fan Cam: September 9, 2000
2000 · Bill Alfonso (Manager)
ECW Fan Cam: August 25, 2000
2000 · Bill Alfonso (Manager)
ECW: Extreme Evolution
2000 · Bill Alfonso (Manager)
ECW Heat Wave 2000
2000 · Bill Alfonso (Manager)
ECW Fan Cam: June 3, 2000
2000 · Bill Alfonso (Manager)
ECW Living Dangerously 2000
2000 · Bill Alfonso
ECW Fan Cam: January 27, 2000
2000 · Bill Alfonso
ECW Guilty as Charged 2000
2000 · Bill Alfonso (Manager)
ECW Fan Cam: December 17, 1999
1999 · Bill Alfonso (Manager)
ECW November to Remember 1999
1999 · Bill Alfonso (Manager)
ECW Fan Cam: October 23, 1999
1999 · Bill Alfonso (Manager)
ECW Fan Cam: October 15, 1999
1999 · Bill Alfonso (Manager)
ECW Anarchy Rulz 1999
1999 · Bill Alfonso (Manager)
ECW Heat Wave 1999
1999 · Bill Alfonso
ECW Fan Cam: May 29, 1999
1999 · Bill Alfonso (Manager)
ECW Hardcore Heaven 1999
1999 · Bill Alfonso (Manager)
ECW CyberSlam 1999
1999 · Bill Alfonso (Manager)
ECW Living Dangerously 1999
1999 · Bill Alfonso (Manager)
ECW Crossing The Line 1999
1999 · Bill Alfonso
ECW Fan Cam: February 6, 1999
1999 · Bill Alfonso (Manager)
ECW Fan Cam: January 30, 1999
1999 · Bill Alfonso (Manager)
ECW House Party 1999
1999 · Bill Alfonso
ECW Guilty as Charged 1999
1999 · Bill Alfonso
ECW November To Remember 1998
1998 · Bill Alfonso (Manager)
ECW Fan Cam: September 17, 1998
1998 · Bill Alfonso (Manager)
ECW Heat Wave 1998
1998 · Bill Alfonso
ECW A Matter of Respect 1998
1998 · Bill Alfonso (Manager)
ECW It Ain't Seinfeld
1998 · Bill Alfonso (Manager)
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