Matt Kuchar held a one-shot lead at the end of day two of the Crowne Plaza Invitational at Colonial despite not completing his second round because of rain.
The Ryder Cup star was five under through 15 when bad weather brought a halt to play for a second and final time to sit 10 under overall, one clear of Canada's Graham DeLaet, the clubhouse leader.
That left Kuchar, who had played his tee shot on the 16th when the horn sounded, and 53 others to come back in the morning and complete their second rounds.
He told pgatour.com: "That's a bit of a bummer. It's no fun to wake up at 4:30 to get out here and play three holes. But we get used to it for what we do."
"That's a bit of a bummer. It's no fun to wake up at 4:30 to get out here and play three holes" - Matt Kuchar
At least Kuchar will wake up knowing he holds the lead, having carded five birdies without dropping a shot on his second circuit.
"I really got off to a great start," Kuchar said. "And then I kept playing some good golf. This course can give you trouble, but if you are hitting it good, you can make some birdies out here.
"I was hitting it good and able to fire at some pins today."
DeLaet was one of the lucky ones who was unaffected by the weather, with his three-under morning round of 67 completed before rain caused a two-hour hiatus, though he could have been even better placed but for a run of three straight bogeys from the third.
DeLaet was one clear of a quarter of Americans: Josh Teater, Jordan Spieth and Steve Flesch, who were all in the clubhouse, as well as first-round leader Ryan Palmer, who was level for the 12 holes he completed.
Freddie Jacobson and Chris Stroud were seven under, while defending champion Zach Johnson had a better day, sitting five under through 16 for a six-under total and a share of ninth.
England's Brian Davis, who has already had a productive week having booked his place at the Open at a qualifying tournament in Texas on Monday, was safely in the clubhouse on five under, but compatriot Greg Owen and Scotland's Martin Laird were outside the projected cut mark of one under.