The PBA World Championship is one of five major PBA (Professional Bowlers Association) bowling events. It is one of three PBA Tour major events that are open only to PBA members. (The U.S. Open and USBC Masters allow qualifying amateurs to enter.) Prior to 2002, the tournament was called the PBA National Championship. The PBA National Championship was first contested on November 28, 1960, then called the First Annual National Championship; the winner was PBA Hall of Famer Don Carter. Tournament champions currently win the Earl Anthony Trophy, named in honor of the late PBA legend who won this title a record six times (1973–75 and 1981–83). The World Championship has occasionally offered a $100,000 top prize, and as much as $150,000 in 2020. Background The National Championship and World Championship have been contested over the years using a variety of formats. Currently, the PBA World Championship format is different from normal PBA Tour events. Since the 2009–10 season, the initial qualifying scores for the World Championship have come from other stand-alone tournaments at the PBA World Series of Bowling, which celebrated its 13th anniversary in 2022. Thus, the current tournament is open to any PBA member who also enters the World Series of Bowling. For the 2009–10 season, the PBA World Championship was part of the World Series of Bowling held in Allen Park, Michigan, and was contested in a split format. The qualifying rounds of the tournament were contested August 31 – September 4, with the televised finals being broadcast live on ESPN December 13, 2009. The PBA's second World Series of Bowling in 2010 was contested in Las Vegas, Nevada, and was again used as qualifying for the 2010–11 PBA World Championship. This time, the 60-game qualifying scores for the five "animal pattern" championships held at the World Series were used to determine the 8-bowler TV field for the PBA World Championship finals. The World Championship finals were televised live over three consecutive days (January 14–16, 2011), a PBA first. Currently (as of the 2021 WSOB XII), combined scores from the 30 games of qualifying (10 games each) on three different animal oil patterns determine the top 30 for the cashers round of the PBA World Championship. These 30 players then bowl ten more games (two five-game blocks) on the Earl Anthony 43 oil pattern, which is named after the six-time winner of this event. The cashers