Johnson was suspended by his club for the first five matches of the 2007 season after he was arrested for public drunkenness in Wangaratta on 24 December2006 - a charge which was later dropped. He returned in Round 6 against where he went on to contribute 21 possessions and two goals in a match Geelong won by 157 points. He went on to post career-best numbers across the board, capped off by All-Australian selection on the half-forward flank in September. His 2007 season was capped off when Johnson lead the Cats to victory in the Grand Final, collecting a premiership medallion, and winning the Norm Smith Medal for best on ground in the Grand Final. Johnson was hailed as a feel-good story for the year, with a good example of a player reforming after disciplinary action. Early in 2008, Johnson lost his drivers' license and was sentenced to 50 hours working with the Transport Accident Commission after he was clocked in over 70 km/h over the speed limit in a 50 zone. Teammate Shannon Byrnes was in the car at the time. He had yet another stellar season on-field in 2008, kicking 49 home-and-away season goals and earning a spot on the forward flank in the All-Australian team of 2008. He gathered 34 disposals in the Cats' Grand Final loss to Hawthorn. In the 2009 AFL season, he played 18 matches and kicked 40 goals, finishing tenth in the Geelong best and fairest award. He was a member of the Cats 2009 Premiership winning team. In 2011, 'Stevie Wonder', struggled to consistently produce the captivating form that had won him All Australian selection in previous years. He was still a force though, gaining recognition by being honored in the initial All-Australian squad of 40. His season nearly came to an abrupt end, when during the third quarter of the Preliminary Final between Geelong and West Coast, he appeared to sustain a serious injury to his left knee. Racing against the clock in order to gain fitness for the Grand Final against the Magpies, it was heavily speculated that Johnson would be unable to gain full fitness in time. For almost the entire week, whilst his team-mates trained in the spotlight, Johnson spent time up in Melbourne in a hyperbaric chamber. He recovered, and played a vital part in the Cats win over the Pies. He went on to kick 4 goals amongst 14 possessions, thus claiming his third premiership medallion.
GWS Giants
In October 2015, Johnson signed a one-year contract with. In his first match against his old club in Round 2, Johnson kicked two goals as his new club won by 13 points. On September 28, 2016 Johnson announced he had signed a one year contract extension with GWS, after missing their preliminary final loss due to suspension. Johnson played the final game of his career in the 2017 Preliminary Final, where he collected 15 disposals and 4 marks in a 36 point loss to Richmond.
