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.
19 de enero 2019
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|Mickelson maintains Desert Classic lead|
|Klopp dismisses Coutinho rumours|
|Osaka completes stunning comeback in Melbourne|
|Lakers guard Rondo cleared for full-contact practices|
|Solskjaer: Lukaku is big part of Man United squad|
|Napoli slam FIGC decision to reject Koulibaly appeal|
|We´re the hunters! - Kovac´s Bayern ready to chase down Dortmund|
|Chiefs safety Reid expected to play against Patriots|
|Chelsea not ready to rest Jorginho - Sarri|
|NFL receiver Fitzgerald has hole-in-one in round of golf with former president Obama|
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|Saints show no mercy, score 111 in rout of Timisoara Saracens|
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18 de enero 2019
|Edinburgh clinch home quarter-final, Glasgow also advance to last eight|
|Hazlewood to miss Sri Lanka Tests with back injury|
|Norwich City 3 Birmingham City 1: Canaries end winless run to go second|
|Hoffenheim 1 Bayern Munich 3: Goretzka goals close gap on Bundesliga´s return|
|Cowboys part ways with offensive coordinator Linehan|
|Payton´s message to Saints fans: Hurry up and make noise|
|Transfer talk no distraction for Inter, says Spalletti|
|Memories of 2015 still linger for Vunipola as England begin World Cup year|
|De Bruin´s 85th-minute try consigns Kings to eighth straight loss|
|Bielsa´s Derby County dossier detail ´pretty standard´ – OptaPro chief|
|Injury-hit Madrid lose Navas to adductor issue|
|Patriots coach Belichick still gets nervous ´every week´|
|Copa del Rey draw: Barcelona to meet Sevilla in quarter-finals|
|Kohli: No one more committed to India than Dhoni|
|Brook questions Khan credibility following Crawford agreement|
|Sad Pochettino admits Bielsa is ´wrong´|
|Simeone eyes LaLiga gain after Atletico´s Copa del Rey pain|
|Rossi a no-go for Tottenham as Pochettino rules out panic buys|
|Guardiola identifies ´three or four´ midfield targets|
|Nadal encourages patience in young stars after humbling De Minaur|
|NFL playoffs 2019: 10 Opta facts for Patriots v Chiefs|
|Robertson helping Klopp learn Scottish for Dalglish chats|
|Levante appeal over alleged ineligible Barcelona player rejected|
|NFL Playoffs 2019: 10 Opta facts for Rams v Saints|
|Lowry to take three-shot Abu Dhabi lead into final round|
|Training is not for anyone else - Klopp condemns Bielsa over ´spygate´ row|
|In other countries, everybody does it - Guardiola respect remains for spying Bielsa|
|Cilic battles back to join Nadal, Federer in fourth round|
|Klopp: Trent unbelievable for playing through pain|
|Faulkner provides super start and fabulous finish to sink Scorchers|
|Ref admits error in key foul call on Lonzo Ball in Lakers-Thunder game|
|Marina Granovskaia is working very hard – Sarri ´confident´ of January signings|
|Tuchel confirms Rabiot out of PSG contention|
|Madrid derby kick-off confirmed for February 9|
|Benzema fit to face Sevilla despite broken finger, Solari confirms|
|Bournemouth boss Howe says no offers received for Wilson|
|Kerber cruises after Wozniacki, Sabalenka upsets|
|Mbappe a great player and great person, says beaming Beckham|
|Gracia confident someone will step up if Doucoure leaves for PSG|
|Albrighton signs new Leicester deal|
|Niasse joins Cardiff on loan from Everton|
|Hendrick credited with Fulham strike|
|Western Sydney Wanderers 1 Adelaide United 2: Goodwin compounds Wanderers woes|
|Chahal and Dhoni carry India to ODI triumph|
|Levante report Barcelona for alleged use of ineligible player in Copa del Rey|
|Solskjaer regrets Sanchez´s Reading setback|
|Tomic brands Hewitt a ´liar´ as feud continues|
|Ruthless Nadal thrashes teenager De Minaur|
|Wozniacki enjoyed status as defending champion in Melbourne|
|Solskjaer backs Mourinho to return to football´s big time|
|Murray to miss Open 13 Marseille|
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|The big Friday Premier League quiz|
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|It´s insane! - Tsitsipas excited to face ´legend´ Federer|
|Sharapova ends Wozniacki title defence|