Hideki Matsuyama was disqualified from the Memorial Tournament in the first round because of an equipment violation.
A PGA Tour rules official spoke to Matsuyama on the course and informed him he had a nonconforming club in his bag:
PGA TOURHideki Matsuyama has been disqualified from <a href="https://twitter.com/MemorialGolf?ref_src=twsrc%5Etfw">@MemorialGolf</a> for a non-conforming club (rule 4.1a). <a href="https://t.co/7Z1HHH0LwG">pic.twitter.com/7Z1HHH0LwG</a>
Steve Rintoul explained that a white substance on one of Matsuyama's fairway woods ran afoul of tour rules. He had used the club on his first tee:
This article will be updated soon to provide more information and analysis.