He has won five times on the PGA Tour, making him one of Sweden's most successful players alongside Jesper Parnevik and Henrik Stenson.

On 17 August 2008, Pettersson holed a closing 12 inch putt for a two stroke victory in his adopted hometown of Greensboro to win the Wyndham Championship.

[5] After finding success on the PGA Tour, Pettersson experienced a lackluster year in 2009, where in one stretch out of 15 tournaments he had 10 missed cuts and two withdrawals.

[6] On 25 July 2010, Pettersson won his fourth PGA Tour event at the RBC Canadian Open by one stroke over Dean Wilson.

The feat of winning after making the cut on the number wasn't repeated on the tour until Brandt Snedeker won the 2016 Farmers Insurance Open.

[7] Pettersson won for the fifth time on the PGA Tour in April 2012 at the RBC Heritage at Harbour Town Golf Links.

He shot another even-par round, despite incurring a two stroke penalty for grounding his club in a hazard at the first hole and ended in a tie for third place, his best finish in a major.