Davis Riley eagled his final hole to make the cut on the number at the Byron Nelson on Saturday after the PGA Tour's first two-stroke penalty in the experimental use of distance measuring devices.
Riley self-reported the violation on No. 17, his eighth hole, when his distance finder flashed a slope measurement, which isn't allowed. This is the third of four weeks that players are allowed to use the devices to measure distance as the tour tries to address pace-of-play issues.
The 28-year-old Dallas resident made an 11-foot putt for eagle on the par-5 ninth to finish 5 under. Hometown favorite Scottie Scheffler was 18 under and held a six-shot lead after 36 holes.
Riley said he knew immediately it was a slope number that popped up on his device as he used it. He talked to a rules official while still on the par-3 stadium hole at TPC Craig Ranch in the Dallas suburbs.
"Unfortunately, it was just kind of one of those moments where your heart sinks a little bit, like you're just throwing away two shots," Riley said. "We certainly have a trial period here with this, and I know the USGA is trying to do something about the range finder and the pace of play."