Newton Square, Pa. • Justin Rose did his part on another day of low scoring Saturday in the BMW Championship, running off four straight birdies early for a 6-under 64 and a one-shot lead over Rory McIlroy and Xander Schauffele.
At stake for Rose is moving to No. 1 in the world for the first time in his career.
Still ahead is a final round at soggy Aronimink Golf Club that could take more than one day to complete because of rain in the forecast, along with a 13 player within five shots of the lead.