popularize baseball in China. MLB played the MLB Taiwan All-Star Series in Taiwan in November 2011. It was a series of five exhibition games played by a team made up of MLB players called the MLB All-Stars and the Chinese Taipei national baseball team. The MLB All-Stars swept the series, five games to zero. At the end of the 2011 season, it was announced that the Seattle Mariners and the Oakland Athletics would play their season openers in Japan. In October 2013, Phil Rogers of the Chicago Tribune wrote that MLB was considering postseason all-star tours in Taiwan and Korea; baseball is increasing in popularity in both countries. The Arizona Diamondbacks opened the 2014 season against Los Angeles Dodgers on March 22–23 in Australia. The teams played each other at the historic Sydney Cricket Ground, which has a seating capacity of 46,000. The two games represented the first MLB regular-season play held in that country. The games counted as home games for the Diamondbacks, so they played 79 home games at Chase Field. In 2019, the Red Sox were the home team in a regular-season two-game series against the Yankees. The games, which were the first regular-season MLB games held in Europe, were played on June 29–30 at London Stadium with the Yankees winning both games. Together with the World Baseball Softball Confederation, MLB sponsors the World Baseball Classic, an international baseball tournament contested by national teams. Performance-enhancing drugs In 1998, both Mark McGwire and Sammy Sosa hit more home runs than the record of 61 set by Yankees right fielder Roger Maris in 1961. Barry Bonds topped the record in 2001 with 73 home runs. McGwire, Bonds, and Sosa became the subjects of speculation regarding the use of performance-enhancing substances. McGwire later admitted that he used a steroid hormone that was still legal in baseball during the 1998 season. Baseball's original steroid testing policy, in effect from 2002 to 2005, provided for penalties ranging from a ten-game suspension for a first positive test to a one-year suspension for a fourth positive test. Players were tested at least once per year, with the chance that several players could be tested many times per year. A 2006 book, Game of Shadows by San Francisco Chronicle investigative reporters Lance Williams and Mark Fainaru-Wada, chronicled alleged extensive use of performance enhancers, including several types of steroids and growth hormone by baseball superstars Barry