American professional bowler and champion horseshoe pitcher. Williams was the first person to earn more than $2 million, $3 million, and then $4 million in prize money from bowling.

Williams joined the Professional Bowlers Association (PBA) tour in 1980, after graduating from California State Polytechnic University at Pomona, where a paper he prepared for a senior science course was an analysis of the motion of a bowling ball during its roll toward the pins. He did not win his first PBA title (tournament) until 1986, when three tournament victories brought him Bowler of the Year honours, which he also won in 1993, 1996–98, and 2003. With his 42nd PBA title in 2006, Williams passed Earl Anthony (Anthony, Earl Roderick) for most career titles. Williams was inducted into the PBA Hall of Fame in 1995. He was one of the stars of the documentary A League of Ordinary Gentlemen (2004), which followed four professional bowlers on the PBA tour for one year.

Williams's interest in horseshoes, which are delivered in an underhand manner somewhat similar to bowling, never lagged, even though it earned him only a few thousand dollars, compared with the millions he earned from bowling. He won the World Horseshoe Pitching Championship, sponsored by the National Horseshoe Pitchers Association of America, six times (1978, 1980, 1981, 1985, 1991, and 1994).