After Scottie Scheffler's latest win at the Memorial Tournament, much of the talk coming into this week's RBC Canadian Open was how Rory McIlroy would respond in his first start since the PGA Championship.

McIlroy turned in 5-over 40 and then started his back nine in bogey-double-par-bogey. In danger of shooting in the 80s, he played his final four holes in 1 under. The 78 was McIlroy’s worst score since shooting the same number in the first round of last year’s Open Championship.

Rory McIlroy tumbled out of the RBC Canadian Open on Friday with his second-highest score to par in any PGA Tour round of his career, with Cameron Champ taking a two-stroke lead into the weekend in the final event before the U.