Couples had five holes remaining in his second round Saturday when play was halted due to darkness. He paired a birdie with a bogey Sunday to remain at 9 under for the tournament.
Scott Hoch (68) and Ronnie Black (69) are three strokes off the pace, with Bernard Langer, Mike Goodes and Tommy Armour III at 5 under. Defending champion Loren Roberts was at 3 under, while Paul Azinger was 1 under in his Champions Tour debut.
The tournament has been trying to get back on schedule after Friday's opening round was postponed due to high winds with most of the field still on the course.