And he will face a possible penalty from the PGA Tour for failing to play enough events this year as part of its field enhancement criteria.
The Texan, without a win this season, shot a one-over 71 in Philadelphia on Friday and the decision to move the final round to Monday, rather than stop it at 54 holes due to inclement weather, offered him another chance to climb the FedEx Cup playoff rankings. That put him in violation of a new PGA Tour rule created to route big-name players to smaller events.
"I'm speechless; it took a lot of hard work and lot of people helped me along the way", Bradley said.More news: This may be our first look at OnePlus 6T in flesh
Fourth-ranked Rose, who lipped out a 15-foot par putt on the 18th, needed a victory or a solo second-place finish behind anyone but American Justin Thomas to claim the number one ranking.
His victory capped a long week that stretched to Monday after persistent rain left the course unplayable for the scheduled final round on Sunday.
The pair finished one shot ahead of Americans Xander Schauffele and Billy Horschel. He obviously made his schedule around the intended reality that he would both make it to the Tour Championship and be on the Ryder Cup team. Rory McIlroy (68) finished two shots behind, while Tiger Woods (65) was three back.
"Just a poor playoff".More news: Apple expected to unveil bigger, pricier iPhone today
"I talked to the Tour a little while back and I didn't really think much of it and it becomes a situation then".
"To get to world No 1 is unbelievable, and I can say now in my career I've been the best player in the world", said Rose afterwards. "It's over before you know it", Rose said.
The BMW Championship was the third of four FedExCup season-ending play-off events on the PGA Tour. It was the third unplanned Monday finish on the PGA Tour this season. Spieth entered the week 27th on the FedEx Cup points standings but slipped to 31st, with only the top 30 advancing to East Lake.More news: More than 1 million to flee as Florence rips toward East Coast