Jason Kokrak earned a record lead at the AT&T Byron Nelson as two-time major champion Jordan Spieth sensationally missed the cut.
Kokrak was the star performer on Friday after carding an almost flawless eight-under-par 62.
The American's performance saw him move five shots clear to 12 under atop the leaderboard – the greatest 36-hole lead at the PGA Tour tournament since David Love III's four-stroke advantage in 2000.
Billy Horschel (65) is second heading into the weekend, but world number one Dustin Johnson is lurking in Irving, Texas.
U.S. Open champion Johnson posted back-to-back 67s to be tied for third at six under following the second round.
Teeing off on the back nine, Johnson was flawless as he birdied the 18th before adding another three consecutive birdies from the fifth to the seventh at Four Seasons Resort and Club Dallas.
Johnson would have been five shots adrift had he not bogeyed his final hole.
An Byeong-hun (66), Cameron Tringale (68), Bud Cauley (67), overnight leader James Hahn (70) and Jhonattan Vegas (68) are also six under.
Former world number one Jason Day is nine shots behind Kokrak following his second-round 69.
Masters winner and defending champion Sergio Garcia posted a five-under-par 65 to be two under through 36.
However, it was a day to forget for Spieth after he farewelled the tournament.
Spieth fired a five-over 75 with a quadruple-bogey nine on the par-five 16th hole as he missed the cut for the third time in four starts.
Spieth was well inside the cut line before the implosion that forced him to re-tee twice.
21 de septiembre 2017
|Wenger denies punishing Sanchez with lack of playing time|
|Coaches denied Lions whitewash over All Blacks - O´Brien|
|Athletic´s Yeray overcomes cancer for a second time|
|Wenger wanted Barry at Arsenal before Manchester City move|
|SANZAAR announce 2018 Super Rugby schedule|
|Mourinho: Scrapping EFL Cup could help English clubs in Europe|
|Neymar left Barcelona because of Messi – Mathieu|
|Ashes concerns linger over England batting, admits Strauss|
|Dembele drops hint of early Barcelona return|
|Gonzalez spins another gem for Nationals|
|Sutton re-signs with Rabbitohs for 2018|
|Copa Libertadores Review: Nine-man Barcelona reach semis, Gremio also advance|
|Red Sox ace Sale reaches 300-strikeout milestone|
|Neville: Rashford as good as Mbappe and Dembele|
|MLS Review: Montreal win derby, Atlanta put four past Galaxy|
|Rahm proud of consistency in 2017|
|Madrid can overturn deficit as captain Ramos remains calm|
|Neymar wouldn´t have treated Messi like he did Cavani – Forlan|
|Twins´ Dozier calls for mandatory protective netting after young fan hit by foul ball|
|Bengals boss Lewis warns players about their job security|
|76ers set no limits on Simmons|
|Zidane not worried after Madrid lose ground on Barca|
|Casemiro calls for Madrid calm after shock Betis loss|
|Sane sends message to Guardiola as Manchester City shake off West Brom|
|Keep calm and carry on – Allegri backs Higuain to rediscover scoring touch|
|Bosz proud of table-topping Dortmund after Hamburg triumph|
|Marlins slugger Stanton crushes 56th home run|
|Montella points to schedule after uninspired Milan win|
|Conte confirms Luiz will be fit to face Atletico|
|Manchester City boss Guardiola hopeful Gundogan injury not serious|
|Real Madrid 0 Real Betis 1: Ronaldo´s return ruined as Sanabria stuns LaLiga champions|
|Wilshere is ready for the league - Wenger|
20 de septiembre 2017
|Simeone lauds ´different class´ Griezmann|
|Mourinho praises United´s professionalism in EFL Cup win|
|Spurs to host West Ham in EFL Cup fourth round|
|Froome: Time to put my feet up|
|West Brom 1 Manchester City 2: Sane at the double amid fresh Gundogan fears|
|Manchester United 4 Burton Albion 1: Mourinho´s men begin EFL Cup defence in style|
|Arsenal 1 Doncaster Rovers 0: Walcott hits winner for Wenger´s men|
|AC Milan 2 SPAL 0: Penalty double seals comfortable win for Montella´s side|
|Chelsea 5 Nottingham Forest 1: Hazard on form as Batshuayi claims hat-trick|
|Juventus 1 Fiorentina 0: Mandzukic on target as Bianconeri maintain winning start|
|Returning Gundogan limps out of impressive Manchester City return|
|Hamburg 0 Borussia Dortmund 3: Bosz´s men cruise back to Bundesliga summit|
|Broady stuns Mannarino in St Petersburg|
|Athletic Bilbao 1 Atletico Madrid 2: Correa and Carrasco strike in second-half surge|
|Simon suffers surprise Moselle Open exit as home hopes struggle in Metz|
|South Africa announce India schedule and planned four-day Zimbabwe Test|
|I have nothing to prove - Paulinho|
|Prodl pens new four-year Watford contract|
|Monaco renew Subasic, Raggi deals|
|Stoneman is ready for Ashes test - Cook|
|Sampson sacked as England Women´s boss|
|Manchester United to act against ´offensive behaviour´ after Lukaku race row|
|Atletico Madrid´s Wanda Metropolitano to host 2019 Champions League final|
|Flying Dutchman Dumoulin crowned world champion|
|Wickmayer topples Peng in Guangzhou, Hogenkamp makes Seoul progress|
|Solomona focused on Sale rather than England return|
|‘Raging Bull’ Jake LaMotta dies aged 95|
|Chelsea confident of recruitment compliance amid FIFA investigation|
|Brighton seal permanent signing of Newcastle keeper Krul|
|Louw, Nkosi and Schreuder get Springboks call|
|Perez donates 3m pesos to Mexico earthquake fund|
|Injured Mathews out of opening Pakistan Test|
|Double leg break victim Rossi to attempt incredible Aragon GP return|
|Barcelona condemn Spanish crackdown on Catalonia independence vote|
|Muguruza marches past Puig, Pliskova and Kerber progress in Tokyo|
|Benzema seals Real Madrid stay until 2021|
|Smith defends captaincy ahead of landmark ODI|
|Perisic promised Inter can match Manchester United|