[3] He was previously the all-time top scorer for FC København together with Lars Højer Nielsen, they both scored 54 goals for FCK,[4] but they have later been surpassed by Cesar Santin and Dame N'Doye.
Jónsson spent a large portion of his career at the Danish Superliga side FC Copenhagen, having arrived in 1997 from Lyngby BK together with the new CEO Flemming Østergaard.
On 25 June 2009, it was announced that Jónsson had rejoined KÍ Klaksvík, who, however, were unable to maintain their place in the Faroese top division.
[6] In the Faroe Islands, Jónsson is arguably the most successful football player of all time, having played at an internationally high level for the better part of a decade with the Danish Champions FC Copenhagen.
Todi is remembered for his premature and controversial international retirement in the spring of 2001, as he decided to concentrate fully on his club career.