Why Brooks Koepka withdrew from final round of RBC Canadian Open despite being 6-under

Brooks Koepka withdrew from the final round of the RBC Canadian Open despite being 6-under par at the time of his withdrawal. The five-time major champion had been playing well in the tournament before pulling out, though the specific reason for his withdrawal was not detailed in the excerpt. His exit marked a notable absence from the leaderboard at a key PGA Tour event.