Martin Trainer moved to the top of the Houston Open summit before play was again cut short due to darkness.

Like the opening round, players were forced from the field in Houston as fading light brought a premature end to Friday's second round.

Trainer managed to complete his second 18 holes and found himself in rare territory, a stroke clear at Memorial Park.

Back-to-back 65s left the 2019 Puerto Rico Open champion atop the leaderboard, with a number of players yet to finish their rounds as the PGA Tour tournament continues to play catchup.

A look at the leaderboard after Round 2 was suspended for darkness @HouOpenGolf:

1. @MartinDTrainer -10
2. Kevin Tway -9
3. @JayKokrak -8 (11)
4. @ALongShot -7
T5. @KramerHickok -6
T5. @ACSchenk1
T5. Scottie Scheffler
T8. 6 tied -5
— PGA TOUR (@PGATOUR) November 13, 2021

"Last week I hit the ball really well for the first time in a long time and I just didn't putt very well," said Trainer, who had one made cut in his last 18 starts entering the event.

"So I figured if I could somehow do both those at the same time -- to be fair, every single player says that every single week. But for me, it had been such a long time coming. It really was a grind for a long time.

"So now to finally be able to put it together ... you have to hope that this is the week."

Ending the day with a BANG. @PReedGolf sinks his final shot before the horn blows for darkness. pic.twitter.com/YJkwlXl2FP
— PGA TOUR (@PGATOUR) November 12, 2021

Fellow American Kevin Tway ended the day a shot behind Trainer, while Jason Kokrak was on track to seize the lead at eight through 11 holes.

The second round will be completed on Saturday and Brooks Koepka is set to miss the cut for the second consecutive week.

Four-time major champion Koepka shot a second-round 72 to be three over, below the projected cut of one over.