World ranking gap widens between US and Europe Golf notes: World ranking gap widens between US and European tours; 12 players added to Masters field Check out this story on USATODAY.com: http://usat.ly/2hpROJt The European Tour is introducing the Rolex Series this year, which starts in late May with the BMW PGA Championship at Wentworth and ends in late November with the season-ending DP World Tour Championship in Dubai. The other events that make up the Rolex Series are Irish Open and Scottish Open in successive weeks ahead of the British Open; the Italian Open in October; and then the Turkish Airlines Open and Nedbank Challenge in South Africa leading into the finale in Dubai.