More than three inches of rain since late Thursday night drenched the layout and organisers decided yesterday afternoon to delay the final round until 7am today (1100 GMT) with threesomes starting off the front and back nines. Through three rounds, he has missed just eight of 54 greens.
Casey suffered a back problem on the eve of The Players Championship in May and was forced to pull out ahead of the first round at Sawgrass, although he returned to action a fortnight later in the BMW PGA Championship at Wentworth, finishing in a tie for 20th.
"Clearly we have kind of a mess out there and as of right now the golf course is unplayable", White said.
"We will do everything we can to play tomorrow", White said.
"This was the shot of the entire day, a three-iron from 230 and I just laced it up in the air", the 42-year-old American said.
With more rain and thunderstorms forecast for Monday, the possibility of the elite, 70-man event being shortened to 54 holes is growing and would mean leader Justin Rose would be crowned the victor. He would most likely move to No. 1 in the world for the first time with a victory. He'd also solidify his position in the FedExCup race, jumping from No. 3 to No. 2 in the standings and increasing the number of scenarios in which he could capture the season-long prize.
Finau stands in a tie for 15th place in the BMW tournament and is scheduled to tee off at 6:30 a.m. local time on Monday. Schauffele finished 12 in qualifying and figured that he needed at least a BMW win to enter the conversation.
Jordan Spieth was projected to fall just outside the top 30 in the FedEx Cup, which would mean missing the Tour Championship and getting some form of penalty from the PGA Tour because of his schedule. The 14-time major champion should play in weather-delayed tournaments more often, apparently.
"We're just going to do the best we can", White said, "and hopefully we can play".