Birdie: Y.E. Yang
Of the players on the leader board, the 2009 PGA Champion is the most likely to hunt down McIlroy on the weekend, and not only because he's the nearest pursuer, six shots back at five under. It was only two years ago, remember, that Yang came from behind to Tiger Woods in the final round at Hazeltine. His deficit to Tiger Woods after 36 holes that week? Six shots