Bryson DeChambeau is testing new TaylorMade prototype drivers at Shinnecock Hills as the U.S. Open approaches. Multiple reports say the drivers he is trying are TaylorMade Qi4D Proto 200+ models. The prototypes were added to the USGA’s conforming list shortly before the reported testing session, with the additions appearing on the conforming list on Monday. After the listings, DeChambeau uses the opportunity to trial the newly approved equipment at the course. The accounts indicate two separate Qi4D Proto 200+ driver models were included on the USGA conforming list, and DeChambeau tested them during his time at Shinnecock Hills. Both sources frame the testing as preparation ahead of the championship, tied directly to the USGA conforming approval process. No additional details are provided in the reports about changes from existing models or about DeChambeau’s performance during the test.