Luke Donald needed a top - eight finish at the RBC Heritage to keep No . 1 status . Donald won the Transitions Championship in March but has only one other top-10 finish . He and Rory McIlroy have switched places three times already this season . Sweden 's Carl Pettersson won the tournament by five shots from Zach Johnson .
Luke Donald needed a top - eight finish at the RBC Heritage to keep No . 1 status . He and Rory McIlroy have switched places three times already this season . Sweden 's Carl Pettersson won the tournament by five shots from Zach Johnson .