Matt Kuchar holds a one-shot lead at the end of day two of the rain-hit Crowne Plaza Invitational at Colonial.
The American Ryder Cup man had reached 10-under-par and had just played his tee shot on the 16th when bad weather halted play for the second time of the day.
Kuchar who is five-under for his round so far, having made five birdies without dropping a shot, will be one of the 54 players who will have to complete their second rounds on Saturday.
Canada's Graham DeLaet is a shot behind Kuchar and he managed to finish his three-under-par round of 67 before rain caused a two-hour break in play.
DeLaet could be even better placed but, having the played the back nine first and reached four-under for the day, he made three bogeys in a row from the third, before bouncing back with birdies at eight and nine.
He is nine-under, one shot clear of an American quartet of Josh Teater, Jordan Spieth, Steve Flesch and Ryan Palmer.
Teater (67), Spieth (67) and Flesch (64) have all completed their second rounds, while first-round leader Palmer is level through 12 holes after a 62 on Thursday.
Freddie Jacobson (67) and Chris Stroud (66) are on seven under, and defending champion Zach Johnson is five-under through 16 holes and is joint-ninth on six-under.
England's Brian Davis shot a 68 to reach five-under-par but his compatriot Greg Owen and Scotland's Martin Laird are outside the projected cut mark of one-under, at two-over and level-par respectively.