Furyk had been slated to announce Monday his final captain's pick for this month's Ryder Cup in Paris, but that was postponed when the BMW's finish was pushed to Monday and, potentially given the forecast, even Tuesday. Rose, Rory McIlroy and Xander Schauffele, the lead group, are scheduled to tee off at 9:20 am EST.
For Keegan, today's playoff win over top-ranked Justin Rose is his first PGA Tour title in more than six years.
Despite coming second, Rose moved up to claim the world number one spot.
American 14-time major victor Tiger Woods closed with a 65, moving up to a share of sixth, one shot behind McIlroy.
Final-round tee times at Aronimink Golf Club were originally moved up to 7am in the hopes of beating the weather - but it only ended up meaning an extra long day of waiting for the players.
Tiger Woods, meanwhile was five shots behind after a 66 in the third round that didn't allow him to make up any ground on the lead.
Nadal outlasts Thiem in 5-set US Open thriller
Thiem was also 5-3 ahead in the third set and 4-2 in the fourth before he was reeled in by Nadal , the three-time champion in NY . Nadal then held serve to take a 6-5 lead and closed out the set on Thiem's serve on his third set point.
But his achievement was then slightly overshadowed following a disappointing additional hole at the Aronimink Golf Club which saw him edged out by victor Keegan Bradley.
That miss sent the tournament to a playoff. His chances to represent USA teams in worldwide play had dried up, his preferred putting method was banned, and the confidence that once put him on the cusp of greatness was shot. An indifferent pitch left 15 feet for par, and Rose's effort lipped out. "I was just trying to play". Bradley, the 2011 PGA champion, won for the first time in six years.
"I thought I needed to shoot something around 62 today to have a chance", Woods said.
"I need to start really lifting and getting after it", Woods said of his offseason.
"In order to win out here you've got to be consistent and on a golf course like this, even par is not going to do a whole lot, " Woods said.
"But at the end of the season, to say that I made it to the Tour Championship after what I've been through is a pretty good accomplishment", Woods added. Because he didn't add to his schedule a tournament he had not played in the last four years, he is in violation of the PGA Tour's scheduling policy. Spieth is the first player to violate the policy, which began previous year. The race at the top is incredibly tight and could certainly be affected by what happens at the Tour Championship in two weeks.