Did Hideki Matsuyama violate Rule 8-1 during the final round of the FedEx St. Jude Championship on Sunday ... him line by tapping down his pitch mark after his second shot at the seventh hole ...

Through 64 holes this week, Matsuyama was unflappable - to the point where he'd built a five-shot lead at the FedEx St. Jude Championship ... Matsuyama had stepped on a pitch mark that was off ...