Rory McIlroy and Bryson DeChambeau played together in the final round of the 2020 Charles Schwab Challenge, where DeChambeau showcased his remarkable transformation, averaging 340.4 yards off the tee. McIlroy was visibly impressed, stating, 'It’s nuts. It’s unbelievable,' and acknowledged DeChambeau's commitment to his new approach to the game. This transformation included a 40-pound weight gain during the pandemic, which sparked both admiration and skepticism among peers. Rickie Fowler remarked on the potential limits of DeChambeau's changes, questioning how much speed could be beneficial before becoming counterproductive. DeChambeau's efforts culminated in a series of top finishes, including a victory at the Rocket Mortgage Classic and ultimately winning the US Open by six shots. However, he later adjusted his strategy to balance power with health, illustrating the challenges of sustaining such a dramatic change.