Two-time major champion Dustin Johnson nabbed his second LIV Golf title on Sunday, edging Cameron Smith and Branden Grace in a playoff at Cedar Ridge Country Club near Tulsa, Oklahoma.Johnson birdied his final hole in regulation to get into the playoff then birdied the par-four 18th with a putt from off the green.South Africa's Grace had putted first in the playoff, also from the fringe, narrowly missing.Australia's British Open champion Smith was closest to the hole, but his putt was never on track.Johnson scooped the $4 million first prize from the $25 million purse and joined Talor Gooch - winner of the previous two events - and Brooks Koepka as two-time winners in the Saudi-backed breakaway circuit's first 14 events.Another one in the ??#LIVGolf pic.twitter.com/PlVcS65Z4WThe former world number one had claimed his first LIV title at Boston last year.Atop the leaderboard going into the third and final round, Johnson shook off triple-bogey on the 10th hole to card a three-under 67 to join Grace and Smith on 17-under."Obviously after I made seven on 10 - everything I could do wrong I did wrong on the hole - but to fight back and birdie 18 two times in a row, I'm really happy with that," Johnson said.Smith, five back with nine to play, carded a bogey-free nine-under par 61 while Grace who shot 61 in the first round - closed with a five-under 65.Grace helped South Africa's Stinger team, headed by Louis Oosthuizen, to capture the team title with a 40-under par total.Stinger GC capture their 2??nd team title ????#LIVGolf pic.twitter.com/c5Egsip3djThe next LIV tournament is at Trump National in Washington in two weeks.