At age 18, Jacobson won both the European and the World final of the 1992 Doug Sanders International Junior Championship at Hazlehead Golf Club, Aberdeen, Scotland.

[2] In 1994, Jacobson won the last edition of the British Youths Open Championship, scoring 277 over 72 holes at Royal St David's Golf Club, Wales.

His fourth-place finish on the Order of Merit that year equalled Anders Forsbrand's Swedish record set in 1992, and was the first Swede to win three official money events in one season on the European Tour.

Jacobson's victory at the 2003 Algarve Open de Portugal was the 50th win by a Swedish player on the European Tour.

He beat Ryan Moore, who missed a short four footer at the 72nd hole which would have gotten him into a playoff with Jacobson, but instead settled for a tie with John Rollins one shot behind.

However it was a final round surge from Martin Kaymer that denied Jacobson, the German firing nine birdies on the day to post a 63.

At the 2013 Northern Trust Open, Jacobson had a chance to win his second PGA Tour title when he birdied the 15th and 16th holes in the final round to tie the lead.

Jacobson cut his 2014–15 season short after the Crowne Plaza Invitational to care for his son Max, who underwent open-heart surgery.