A seven-under 65 left Rickie Fowler in a tie for third after The American Express first round.
American superstar Tiger Woods has the most wins - 27 - in Presidents Cup history.
Tiger Woods' 26th victory at the Presidents Cup was a significant moment in Melbourne on Friday.
Not in Melbourne for the 13th Presidents Cup, American golfer Phil Mickelson is watching the USA from afar.
Phil Mickelson's decision to play in Saudi Arabia has been criticised but Tiger Woods feels golf could impact the country positively.
After nearly 26 years inside the upper echelon of world golf, Phil Mickelson dropped out of the top 50 on Monday.
Phil Mickelson reflected on a "good run" in the top 50 stretching back to 1993 and vowed to return after dropping to 51st in the world.
Canadian Nick Taylor edged into the lead after the first round of the Shriners Hospitals for Children Open.
Adam Scott carded a seven-under-par 65 for a share of the one-stroke lead after day one of the PGA Tour tournament on Thursday.
Phil Mickelson has spent the past 25 years inside the world's top 50 and has been recognised for his achievement at The Open.