UPDATE: Merritt Leads Northern Trust, Woods Withdraws

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Troy Merritt isn't obsessed with his position in the FedEx Cup and what he needs to advance in the PGA Tour's post-season.

He figures the best solution is good golf, and he delivered his best round of the year Thursday in The Northern Trust.

Merritt began with a 10-foot par save, followed with a pair of 20-foot birdie putts and took advantage of calm, rain-softened Liberty National by tying the course record with a 9-under 62 for a one-shot lead over Dustin Johnson.

It wasn't a career low, as Merritt twice has shot 61 on the PGA Tour.

Tiger Woods shot 75 for his second-worst score in 89 rounds at the FedEx Cup playoffs leaving him 13 shots out of the lead.

He dropped out of the tournament Friday due to a mild oblique strain. 

Corey Conners is the top Canadian at 5 under.