Tommy Fleetwood carded a six-under 64 to open up a four-shot lead before play was suspended in the second round of the St Jude Championship in Memphis due to severe weather.
Having shot 63 in the opening round, the 34-year-old Englishman followed up superbly with seven birdies.
A bogey on the 18th was the only blemish on Fleetwood’s total of 13 under as he put himself in a strong position for a first ever PGA Tour victory.
After hitting a fine 65, two-time major champion Collin Morikawa is at nine under, along with his fellow American Akshay Bhatia in the opening event of the FedExCup play-offs.
England’s Justin Rose was on the 17th tee and among 21 players still yet to finish when play was stopped due to lightning. He was also four shots adrift of Fleetwood.