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

Jordan Spieth hits off of the first tee during the opening round of the Byron Nelson golf tournament, Thursday, May 19, 2016, in Irving, Texas. (AP Photo/Tony Gutierrez) (The Associated Press)

Jordan Spieth reacts to leaving the ball short on a putt for eagle on the 16th green during Round 1 of the Byron Nelson golf tournament, Thursday, May 19, 2016, in Irving, Texas. (AP Photo/Tony Gutierrez) (The Associated Press)

Dustin Johnson chips onto the second green during Round 1 of the Byron Nelson golf tournament, Thursday, May 19, 2016, in Irving, Texas. (AP Photo/Tony Gutierrez) (The Associated Press)

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 Nelson was suspended.

Sergio Garcia, Danny Lee and Johnson Wagner all shot 63. Lee and Wagner, like Spieth, were just able to complete the round that started 2 1/2 hours late after early morning rain.

Dallas native Spieth, who just missed a long eagle chance on the par-5 16th that would have matched the lead, is playing only his second tournament since squandering a five-stroke lead on the back nine at the Masters. The world's No. 2-ranked player missed the cut last week at The Players Championship.

Dustin Johnson and Freddie Jacobson also had 64s. Tom Hoge, one of 30 players unable to finish, was 6 under through 14 holes.