Masters champion Rory McIlroy tumbled out of the RBC Canadian Open on Friday with his worst round in nearly a year, with Cameron Champ taking a two-stroke lead into the weekend in the final event before the U.

McIlroy shot an 8-over 78, making a mess of the fifth hole with a quadruple-bogey 8 in his highest score since also shooting 78 last year in the first round of the British Open. He had a double bogey on No. 11, four bogeys and two birdies.

Cameron Champ, making the most of his last-gasp entry as an alternate, seized the lead at the Canadian Open on Friday as Rory McIlroy crashed out of his last US Open tuneup.Champ fired four birdies in a four-under-par 66 to seize a two-stroke lead at TPC Toronto Osprey Valley,