In the days leading up to the start of the RBC Canadian Open, a flood of players withdrew for various reasons. One of the most notable cases was Sahith Theegala, who was one of the highest-ranked players to pull out at the last minute.As one of RBC's ambassadors on the PGA Tour, Theegala definitely prioritizes this event.Taking everything into consideration, it was clear that Theegala's decision must have been made for a very serious reason. Hours later, Theegala confirmed the seriousness of his injury on Instagram."The RBC Canadian Open always treats players so well, and I was really excited to play the new venue at TPC Toronto this year," he posted on social media."The place looks beautiful and I've heard so many great things about the golf course and the facility overall. Doctors have advised me to put the clubs away for a little while as I get treatment and rest for an injury I've been battling the last few weeks, so this one stings."Wishing my great friends at RBC a wonderful week. They are first class all the way, and I'll miss competing with all my fellow Team RBC players for Canada's national Open Championship.""Thank you to my fans and sponsors for your continued support. See you all soon!!"This is the first time that Theegala has missed the RBC Canadian Open since he joined the PGA Tour in 2022. In his three starts, he has made two cuts, with his best finish being T38 in 2023.The PGA Tour winner has played in 15 tournaments this year, making 13 cuts. However, his results have not met expectations. He has failed to finish in the top 10 at any tournament this season, and his best result was a tie for 17th place at the Genesis Invitational.This is the third tournament Theegala has withdrawn from this season. Less than four weeks ago, he withdrew from the Truist Championship after completing three rounds due to a neck injury.A week later, he was unable to take his place in the PGA Championship field for the same reason.He played in the Memorial Tournament a week ago, but it was clear that he wasn't fully recovered. This led to him missing his second cut of the season.Based on his social media post, it appears that he will also miss next week's U.S. Open at Oakmont Country Club, and likely beyond.More Golf: RBC Canadian Open Field Weakened as PGA Tour Stars Withdraw