DeChambeau and Johnson are tied at 11 under and hold a two-shot lead over Rahm, Matthew Wolff and Peter Uihlein after two rounds at Las Vegas Country Club.Â
Jason Kokrak and Talor Gooch are tied for sixth at 8 under.
DeChambeau went on a late birdie run to shoot an 8-under 62 on Friday. Johnson matched that 62 by making birdies on his last three holes, Nos.15-17, for a bogey-free card.
The captains of Crushers GC and 4Aces GC, respectively, are both major champions with two LIV Golf individual titles to their name.
DeChambeau opened his round with a birdie at the par-4 fourth and was 5 under through his first eight holes. After picking up his lone bogey at the par-3 12th, he ran off four more birdies, culminating with his last one of the day at the par-3 16th.
Johnson cruised around the course and was 5 under for his day when he reached the par-5 15th. His birdie-birdie-birdie finish featured a 2 at No.16, like DeChambeau.
Rahm is in the mix for the second time in two events since joining LIV Golf in the offseason. The Spaniard shot a bogey-free 63 with seven birdies Friday. He tied for third at the season opener in Mayakoba after a bogey-bogey finish to his final round.
Johnson's 4Aces are tied with RangeGoats GC at 26 under on the team leaderboard, two shots ahead of DeChambeau's Crushers. Patrick Reed (4-under 66) and Pat Perez (1-under 69) combined with Johnson's score for 4Aces in the second round. RangeGoats' team score benefited from Wolff's 4-under 66 and Uihlein's 5-under 65, and captain Bubba Watson added a 2-under 68.
Watson is part of a tie for eighth at 7-under with Australia's Cameron Smith and Englishmen Paul Casey and Laurie Canter.
Casey shared the first-round lead with Harold Varner III, but Casey shot an even-par 70, while Varner dropped out of the top 30 after carding four bogeys without any birdies on Friday.
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