Luke Guthrie stumbled at the end of the third round and shared the lead Saturday with Rafa Cabrera-Bello in the BMW Masters.
Guthrie has led this European Tour event since the opening round, and he had a three-shot lead playing the back nine at Lake Malaren. But he made bogey on two of his last three holes for an even-par 72. Cabrera-Bello played bogey-free in his round of 67, picking up a birdie on the par-3 17th that eventually left him tied with the 23-year-old American.
They were at 8-under 208, one shot ahead of Gonzalo Fernandez-Castano, who had a 67.
Rory McIlroy ran off four straight birdies on the back nine and was working his way into contention until a double bogey on the last hole. He was six behind.