Lists fellow Gothenburg native Henrik Stenson as one of his inspirations.
PGA TOUR (3)
2010 SAIL Open [Asia],
2010 Hero Honda Indian Open [Asia].
2015 Open D'Italia [Eur].
2016: Missed the cut at The Open Championship and PGA Championship in his only two PGA TOUR starts
Posted six top-25 finishes on the European Tour (all in consecutive starts): True Thailand Classic (T25), Shenzhen International (T8), Volvo China Open (T21), Irish Open (T10), BMW PGA Championship (2) and Nordea Masters (7)
At 8-under 280, finished just one stroke behind Chris Wood at the BMW PGA Championship. Closed with a stellar 7-under 65 to make things interesting on the final day, including a hole-in-one on the second hole.2015: Maiden European Tour victory came a few months after getting married, winning the 72˚ Open D'Italia in a head-to-head battle with Martin Kaymer at the Golf Club Milano. Both players finished regulation tied at 19-under with Karlberg winning on the second extra hole. Finished a (then) career-best 56th in the Race to Dubai.2014: Finished No. 124 on the Order of Merit, with top-10 finishes at the Maybank Malaysian Open (T5) and Made in Denmark (T9)
Despite making 70 European Tour starts, did not gain full privileges until doing so at the Qualifying School Final Stage (his ninth try at doing so) late in the year. Prior to that, had played primarily on the Asian Tour
Finished T39 at the 2014 CIMB Classic (2014-15 PGA TOUR Season) for his only career made cut on the PGA TOUR
Only other TOUR start that season was a missed cut at The Open Championship.2013: Finished 130th for the second-consecutive season in the Race to Dubai standings, with a T4 at the Nordea Masters his lone top-10 finish
Missed the cut at the U.S. Open in his only PGA TOUR start.2012: Finished No. 130 in the Race to Dubai, with a fourth-place finish at the Lyoness Open his sole top-10 finish.2011: Wrapped up the season No. 154 in the Race to Dubai standings, with a T11 at the Open de Andalucía de Golf by Turkish Airlines and T13 at the Barclays Singapore Open his best outings.2010: After earning his Asian Tour card through qualifying school, went on to win Asian Tour Rookie of the Year honors. Won the SAIL Open in just his second Asian Tour start
Later added his second Tour title at the Hero Honda Indian Open
Missed the cut at the U.S. Open in his first major championship start.2009: Began his professional career on the European Challenge Tour. Made nine starts, playing on the weekend in six of those events. Best finish was a T16 at the SK Golf Challenge in early August, a final-round 69 leaving him tied with two others, six shots behind winner Nicolas Colsaerts. 2007: Sat atop the Nordic League rankings, thanks to four victories. As a result, earned a spot on the European Tour's Challenge Tour the following season.