(Photo by Keyur Khamar/PGA TOUR)

2. Sung Kang, Quicken Loans National

This one picked up serious steam after Joel Dahmen (above) publicly accused Kang of cheating while they were paired together in the final round. The dispute centered around Kang taking what Dahmen believed to be an improper drop, and the two reportedly discussed it for 25 minutes on-course. It didn’t end there and Kang ultimately issued a statement in response to Dahmen’s accusations, making for a highly-rare public argument between two Tour players on a rules issue.