(CNN) -- American Brian Gay leads the St Jude Classic by one stroke after a second round that was held over until Saturday because of fierce thunderstorms in Memphis.
Gay was fortunate to finish his second round in the St Jude Classic before the heavens opened.
Gay carded a four-under-par 66 on Friday, for a 36-hole total of 130 (-10), before the weather closed in with 78 players still to finish their rounds on the TPC Southwind course.
When play finally resumed Australian Robert Allenby completed his final three holes for a second-round 64 to lead the chasing pack on 131.
American pair Bryce Molder (63) and Vaughn Taylor (65) are a further stroke behind on eight-under-par 132.
Meanwhile, world number two Phil Mickelson, playing for the first time since revealing his wife Amy has cancer, also played out the final three holes of his second round for a level-par 70.
Mickelson birdied his first hole of the day, but closed with a bogey and a double-bogey on 18 -- which he also double bogeyed in his first round -- to finish the day on 138, eight shots off the lead.
John Daly finished his second round on Friday, but had to wait to see if he made the cut -- and the Amercian will be returning for the weekend after finishing right on the cut line of 140.
However, some big names will not be back for the weekend, with British Open champion Padraig Harrington and Spain's Sergio Garcia among those going home in the final warm-up event before next week's U.S. Open.