Greens are always bumpy there in the afternoon. It's the nature of Poa greens, which is the variety of grass on the greens at a few renowned venues there on the west coast.
Pebble is a tough course, or can be anyway. Lots of approach angles that force a player to play away from the Sunday hole locations. DJ had a LW into one of the greens from 95 yards, ended up having to make a 6-footer to save par because he went pin-seeking and ended up in the fringe above the hole, 10 feet away... had to putt sideways just to keep it somewhat close.
As scenic as PB is - it's can also be a very demanding layout depending on the conditions.
We overlook that because we (the fans) see it more as an ultra-expensive resort mecca, but the layout is actually incredibly challenging for these guys on Sunday. The 350-yd tee shot doesn't mean a lot if it leaves the approach at the wrong angle to a tight pin.
Those greens have a lot more slope to them than what appears on the tv camera.