Hometown star Jordan Spieth, trailing co-leaders Marc Leishman and Aaron Wise by 10 shots, was in the first group off the first tee. Threesomes were going off both nines Sunday at the new Trinity Forest course south of downtown Dallas.
The Nelson is celebrating its 50th anniversary with a return to Dallas after 35 years at the TPC Four Seasons in suburban Irving.
PGA Tour officials are hopeful of completing the round without any more delays.
The 21-year-old Wise, who was at 17 under, is looking for his first tour victory in his rookie season. Leishman is a three-time tour winner who opened with a career-best 61 and set a 36-hole Nelson record previously shared by Tiger Woods.
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