Rory McIlroy made an 8 on his fifth hole Friday at TPC Toronto, free-falling down the RBC Canadian Open leaderboard on his way to a missed cut.

McIlroy followed that quadruple-bogey debacle with four bogeys and a double in shooting 8-over 78. He finished at 9 over par, with only three players posting worse scores through 36 holes in Ontario.

This was McIlroy’s final start before next week’s U.S. Open at Oakmont Country Club, where McIlroy got in a practice round Monday before heading to Canada — for a short stay.

After opening in 1-over 71 and parring his first four holes Friday, McIlroy hit his tee shot in the right rough at the par-4 fifth. From 134 yards, he launched his approach shot so far past the spectators around the green that they didn’t notice it soar over their heads.

McIlr

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