In the dark: Spieth shoots 64, a shot back at Byron Nelson

IRVING, Texas (AP) Jordan Spieth finished off a 6-under 64 just before dark Thursday and was within a stroke of the lead when the first round of the AT&T Byron
In the dark: Spieth shoots 64, a shot back at Byron Nelson
In the dark: Spieth shoots 64, a shot back at Byron Nelson /


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