The ongoing prank battle between Rickie Fowler and Danny Lee took an ugly turn today at the WGC-Bridgestone Invitational when Fowler messed with Lee’s clubs before Round 1.

The pranks continue between @RickieFowler and @dannygolf72. https://t.co/0OfQ1skHON

— PGA TOUR (@PGATOUR) June 30, 2016

This isn’t the first time the two have traded pranks. The last one coming only a couple days ago as the two prepared for the WGC-Bridgestone Invitational at Firestone Country Club:

Danny Lee put on a brief art show before the @WGC_Bridgestone. https://t.co/iVugUIaprP

— PGA TOUR (@PGATOUR) June 28, 2016

The two are paired together, along with Kevin Na, in the 1:24pm group for Round 1, and 2. The PGA Tour is in for a long day if these two are going at it.