William "Bill" O'Neill (born October 21, 1981) is a right-handed professional ten-pin bowler who competes on the PBA Tour in North America. He is a resident of Langhorne, Pennsylvania. His nickname on tour is "The Real Deal". O'Neill has won nine PBA titles, including one major championship at the 2009–10 U.S. Open.
O'Neill was the first person to be a two time World Champion after winning the WTBA singles titles (gold medals) in 2010 and 2013.
O'Neill bowled collegiately for Saginaw Valley State University where he was a member of Sigma Pi fraternity. He earned first-team All American honors all four years he competed. He was named Bowling Writers Association of America's Collegiate Bowler of the Year in 2001, 2003 and 2004. He was also honored as the Most Valuable Player by the National Collegiate Bowling Coaches Association in 2003 and 2004.
O'Neill was named PBA Rookie of the Year in his first full PBA season (2005–06), after making the Round of 32 match play 11 times in 18 tournaments and appearing once in the TV finals.
Despite not winning a tournament, O'Neill had an excellent season in 2008-09. He qualified for match play in a career-high 18 of 20 tournaments, made the TV finals seven times (still a career high as of 2017), and narrowly missed winning the PBA's George Young High Average Award (222.96 to Wes Malott's 222.98).
After 83 tournaments and 11 previous TV finals appearances without winning, O'Neill finally earned his elusive first PBA Tour title in the PBA Chameleon Championship on September 6, 2009, defeating Ronnie Russell in the final match. That same season, O'Neill earned his second PBA Tour title and first major title at the 2009-10 67th Lumber Liquidators U.S. Open. After qualifying as the #2 seed, he defeated Tommy Jones in the semifinal match. He started slowly in the championship match against #1 seed and defending champ Mike Scroggins, converting a spare then leaving an open frame. But he then rolled the final 10 strikes of the game, for an easy 267–207 victory.