William Sierra, better known as Bill Alfonso, made a significant mark in the world of professional wrestling as a referee and manager, particularly during his tenure in Extreme Championship Wrestling (ECW) in the 1990s. His notorious whistle and strict rule enforcement made him a polarizing figure among fans, ultimately leading to memorable feuds, including one with ECW founder Tod Gordon. For collectors, his role in pivotal matches and events adds a nostalgic layer, particularly in releases like "WWE: Undertaker 20-0 - The Streak" (2012), which captures the essence of his controversial yet impactful presence in wrestling history. Beyond ECW, Alfonso's appearances in various independent promotions and TNA Wrestling have solidified his status as a sought-after figure in wrestling memorabilia. Collectors often seek out his matches and cameo roles, not only for nostalgia but also for the unique stories he brings to the ring. With a family legacy in wrestling and a career that spans decades, Alfonso remains a notable character in the rich tapestry of wrestling history, making his physical media releases a prized possession for avid fans.