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.
We're Getting Mutants in the MCU - The Loop
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