With daylight dimming, they turned on the lights on at Kuala Lumpur Golf and Country Club for the final group to finish Sunday.
And after 72 holes at the rain-interrupted CIMB Classic in Malaysia, unfinished business still remains.
In thick rough right after an errant 3-wood second shot, Puyallup's Ryan Moore got up and down from 80 yards for par on the 18th hole to stay tied for the lead with fellow American Gary Woodland.
Moore shot 2-under-par 70. Both golfers are at 14-under 274.
Woodland had a chance to win the tournament, but his 10-foot putt for birdie darted left at the hole. Moore finished off a 3-footer from underneath the hole for par.
"Fortunately was able to scramble and make a par," Moore said.
Tournament officials suspended the tournament right after regulation due to darkness. Moore and Woodland will return for a 7:30 a.m. playoff Monday local time - or 4:30 p.m. PDT Sunday.
In fact, play was stopped twice during the final round because of thunderstorms - the first being a three-hour delay.
Moore returned to can a 24-footer for birdie at the 14th to move to 13-under. Woodland also birdied the short par 4 to maintain a one-shot advantage.
But on No. 16, right after the second half-hour rain delay, Moore stuck his wedge shot approach close and made another birdie to tie for the lead at 14-under.
Moore, a Cascade Christian graduate, won his first PGA Tour title in a sudden-death playoff - the 2009 Wyndham Championship. And 55 weeks ago, he added another tournament win at the Justin Timberlake Shriners Hospitals for Children Open.