Stenson won two weeks ago at the Wyndham Championship, and he tied for 17th last week at The Northern Trust. But the Swede has been removed from the published field for the Dell Technologies Championship, which is set to begin Friday.
In addition to his win four years ago, Stenson was also a runner-up to Rickie Fowler at TPC Boston in 2015. While players are not required to disclose a reason for a pre-tournament withdrawal, a tweet from Associated Press reporter Doug Ferguson attributed Stenson's decision to "tightness in his knee."
Stenson entered this week at No. 22 in the season-long points race, meaning he will easily qualify for the 70-man BMW Championship in two weeks despite the withdrawal.