I really feel for Chesson Hadley's caddie Josh Svendsen with this one. Not only did it hurt, but the ribbing his fellow colleagues will give him might be even more painful.
Hadley then spoke to an official who told him it would be okay to use the putter to complete the round. It didn't seem to bother him either, he still putted great with the broken blade.
This was Josh a few weeks ago, doing a MacGyver with a hungry duck, a ball and a granola bar!