It's actually a coin, a krugerrand from South Africa. And it's pure gold, unlike the medal Justin Rose won in Rio de Janeiro at the Olympics. A friend gave it to him, and Johnson was using it Wednesday during his pro-am at the BMW Championship.
Johnson is aiming for something more valuable, at least in terms of cash.
He is No. 3 in the FedEx Cup going into the third playoff event, and the U.S. Open champion is virtually assured of being among the top five who would only have to win the Tour Championship to capture the $10 million bonus.