Sungjae Im had seven birdies in his second round 64 -13 D Johnson; -12 S Im (Kor); -11 X Schauffele; -10 J Thomas; -9 C Morikawa, T Hatton (Eng), J Rahm (Spa); -8 R McIlroy (NI), B Todd
Korea & # 39; s Sungjae Im struck seven birdies to challenge Leader Dustin Johnson midway through the PGA Tour & # 39; s Season Ending Tour Championship.
The 22-year-old started his round seven strokes behind Johnson and Jon Rahm, but a 64 took him to the East Lake Golf Club in Atlanta.
Johnson, however, took a bird's-eye view of his last to make sure he has a slight advantage.
Players at the event are disabled based on FedEx Cup points earned during the season.
After I missed a chance for a birdie on the second, I recovered to catch shots on the next two holes and although he bogeyed the fifth, he birdie of the sixth.
After another birdie on the 10th, he finished strong with three more over his closing four holes.
Xander Schauffele is a shot behind Im, thanks to a five-under-round of 65.
England's Tyrrell Hatton is nine under shooting a 66, the same mark as Rahm who could only save a 74.
It was also a disappointing day for Rory McIlroy, who fell off the field after a 71st and is eight under, five blows behind Johnson.
McIlroy was left particularly frustrated on the 18th par-five after firing his second shot into the water and seeing his long par putt lip come out.
How the Tour Championship Works
Players collect FedEx Cup points during the season and the top 30 in the rankings compete for the Tour Championship.
The player with the highest ranking starts the tournament with 72 holes at 10 under par, while the second seed starts at 8 under.
The third seed leaves at bottom seven and so on to the fifth seed at bottom five. Seeds 6-10 start at −4; seeds 11-15 start at -3; and so on, up to seed 26-30, which will start at level par.