Rory McIlroy’s buildup to next week’s U.S. Open at Oakmont took a further concerning turn on Friday in the RBC Canadian Open. In his first start since his worst finish this season—a T-47 in the PGA Championship—the reigning Masters champion suffered an extremely rare setback—he missed the cut at TPC Toronto.

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 four players posting worse scores through 36 holes in Ontario.

Things went wrong for Rory McIlroy at the RBC Canadian Open as he posted a ridiculous number to miss the cut and nearly finish dead last.