Bill Alfonso
| Personal information | |
|---|---|
| Born | William Matthew Sierra August 11, 1957 |
| Professional wrestling career | |
| Ring name | Bill Alfonso |
| Billed height | 5 ft 10 in (1.78 m) |
| Billed weight | 161 lb (73 kg) |
| Trained by | Extreme Championship Wrestling |
| Debut | 1979 |
| Retired | 2021 |
William Matthew Sierra (born August 11, 1957), better known by his ring name Bill Alfonso, is an American former professional wrestling referee and manager, currently performing for Major League Wrestling (MLW), where he serves as the manager of Matthew Justice. 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.