Jordan Spieth sits one shot behind leader Sergio Garcia following the first round of the AT&T Byron Nelson in Dallas.
The world number two carded a six-under-par 64, but Garcia shares the one-stroke lead with Danny Lee and Johnson Wagner after five birdies and an eagle.
Rain disrupted the opening round and it was eventually suspended due to darkness, preventing a handful of players from completing the day.
Both Spieth and Garcia managed to get round the course, though, and the former suffered one blemish as he recorded a bogey on the 13th hole, but his seven birdies made up for it.
Dustin Johnson, Freddie Jacobson and Tom Hoge are level with Spieth in the field.