Matsuyama snapped his driver, a Srixon ZR 30, out of frustration after hitting his tee shot on Muirfield Village's 18th hole (he had made double bogey and bogey on the previous two holes). However, he went on to make birdie on the 18th to force the playoff with Na.
According to Decision 4-3/12 of the Rules of Golf, Matsuyama was entitled to replace the club for the playoff since a playoff constitutes a new round, but he opted not to do so.
Here's what the 22-year-old Japanese star had in his bag:
__Ball:Srixon Z Star XV
Driver: Srixon ZR 30 (Graphite Design Tour AD-DI 8TX), 10.5 degrees
__3-wood:__Callaway RAZR X Black, 15 degrees
__Hybrid:__TourStage X-UT, 19 degrees
Irons (3): Srixon Z 945 (4-9): Srixon Z 925; (PW): Cleveland 588 RTX CB__
Wedges: Cleveland CG 17 Tour (54, 60 degrees)
__Putter:__Scotty Cameron by Titleist SC-GSS