Bill Alfonso, Date of Birth, Place of Birth
TweetBill Alfonso
professional wrestling referee and manager
Date of Birth: 11-Aug-1957
Place of Birth: Hampton, New Hampshire, United States
Profession: manager
Zodiac Sign: Leo 
About Bill Alfonso
- William Matthew "Bill" Sierra (born August 11, 1957) 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.
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