Jon Rahm had the news broken to him that he had COVID-19 live on TV during a PGA tournament ... one that he was leading the pack in before having to withdraw.
The Spanish golfer -- and reigning champion of the Memorial Tournament, which he was again ahead in on Saturday -- was filmed being approached by PGA officials ... who told him he'd tested positive for the virus, which means he'd have to leave the premises and the game entirely.
It made for such a bizarre moment, as there were cameras all around on the course .