PGA Tour officials altered tee times, moving to threesomes and split tees, beginning at 10:55 a.m. EDT. The final group of leader Tommy Fleetwood, Russell Henley and Keegan Bradley will be at 12:56 p.m. Here’s a look at the adjusted times and groups at TPC River Highlands.

It's not unheard for a golfers to combine groups on a slow day at your local club or municipal track. But on the PGA Tour? That's a different story.