Rose is the 22nd player to reach No. 1 in a world ranking that began in 1986. Though he was runner-up at the FedEx Cup playoff event, he didn't come up short in the world ranking.
Woods, coming back from injury, made the Tour Championship for the first time since 2013.
Both Bradley and Rose missed the green to the right on the playoff hole. "World Number 1. Thank you so much to my family, friends & everybody that has helped me achieve this incredible goal", Rose posted on Twitter.
Jordan Spieth's pockets could get a little lighter soon after he failed to qualify for the Tour Championship on Monday at the BMW Championship.
"It has been tough to go from being on Ryder Cup teams, being on Presidents Cup teams, to outside the top 100 in the world".
"To have a chance to win again, this year, it's a very positive feeling", Woods said. That was about the time he was just starting to cope with back pain. These are two of the four tournaments for the FedEx Cup with the final competition taking place next weekend which sees the top 30 take part. The top 30 on a season-long points list advance to next week's Tour Championship in Atlanta.
Under the new policy, which was approved at the policy board's final meeting on November 22, any player who participated in 25 or more official money events during the current or previous season is exempt from the requirement (of adding a new tournament).
"It's been a consistent season so I'm glad to have made the Tour Champs - hopefully my last event of the year will be my best and I can get a win", Leishman, whose 68 lifted him to a share of 41st at six under.
Still to be determined is the penalty. Spieth will end this year with 24; he ended last year with 23 and added nothing new in the process.
"I turned pro at 18 and it took me 20 odd years to get to world No 1, but my advice would be to just dedicate yourself to improving, to learning, to trying to get better".