After a six-month hiatus from golf over alleged cocaine and alcohol abuse , Dustin Johnson appears to be back on form . On Sunday the 30-year-old claimed victory at the elite World Golf Championships-Cadillac Championships in Miami , telling reporters that fatherhood was behind his improved focus . Following his win , Johnson was greeted at the 18th hole on the Trump National Doral course by his model fiancée Paulina Gretzky - daughter of former NHL great Wayne - and their son Tatum , who was born in January . The new parents shared a passionate kiss in front of cameras , while cradling their newborn between them . Gretzky described her husband-to-be as the 'best dad ' and 'best friend ' she could ever wish for . Scroll down for video . Passionate embrace : After claiming victory at the elite World Golf Championships-Cadillac Championships in Miami on Sunday , Dustin Johnson was greeted at the 18th hole by his family . Doting dad : He was overjoyed to see his model fiancée Paulina Gretzky - daughter of former NHL great Wayne - and their son Tatum , who was born in January . Perfect match : The new parents shared a passionate kiss in front of cameras , while cradling their newborn between them . She continued to ABC News : 'He 's been so supportive with me and we 're just there for each other . I could n't be happier for him . ' Talking about how fatherhood had changed his life for the better , Johnson added : 'It 's hard to describe , but just from the first day he 's born , your perspective on life completely changes . 'Things that were important are n't important anymore . 'It kind of makes life a lot easier I think , just because there 's just one thing that 's kind of all you think about . It definitely simplifies stuff . ' When Johnson announced his decision to step away from golf last July due to 'personal challenges ' , rumors about his lifestyle swirled , including the suggestion that he may have been suspended by the PGA Tour . Indeed , Golf.com reported that Johnson had failed three drug tests : one for marijuana in 2009 and two for cocaine , in 2012 and 2014 . Johnson celebrates with Donald Trump as he holds the Gene Sarazen Cup after winning the WGC-Cadillac Championship WGC at Trump National in Doral . Career success : Johnson turned professional as a golfer in late 2007 in his early twenties . However , the Tour - which had initially said it did not comment on rumors or speculation - released a statement saying Johnson had taken a voluntary leave of absence and had not been suspended . And in a news conference on Sunday when if he had ever failed a Tour drugs test , Johnson replied : 'No . Thanks ' . In a candid interview with Sports Illustrated this January , Johnson revealed that alcohol was his real vice . He said he would excessively drink and party to relieve stress , with his tipple of choice being Grey Goose , soda and lime . In a bid to get clean , Johnson said he took time out from sport and concentrated on home life . Bundle of joy : Johnson 's son Tatum Gretzky Johnson was born on January 19 . Changed man : The golfer says fatherhood has helped him to put his bad boy party days behind him . Love birds : Johnson proposed to Gretzky in August 2013 - as of now , there are no reports of where and when a wedding will take place . Commenting on his time out , he said : ' I got to spend a lot of time with Paulina and help her as much as I could through her pregnancy , and then the birth of our son . ' I really enjoyed being able to be home and not having to leave or do anything . ' I was in the gym every single day , every morning , and then spend the rest of the time either I would go practice a little bit or just hanging out with Paulina . ' Johnson returned to the green in Febuary at the Farmers Insurance Open in Torrey Pines . As he won big on Sunday night , the two most important people in Johnson 's life were waiting for him . He concluded : 'Paulina and Tatum were waiting for me when I got done . That was the best part of the day for sure . ' 'My game is in good form . I feel really confident in my golf swing . I need to do some work with the putter and short game , especially leading into Augusta . ' Johnson proposed to Gretzky in August 2013 . As of now , there are no reports of where and when a wedding will take place .
The new parents shared a passionate kiss in front of cameras , while cradling their newborn Tatum between them . Talking about how fatherhood had changed his life for the better , Johnson said : 'It kind of makes life a lot easier I think , just because there 's just one thing that 's kind of all you think about . '