Sixten Wirtanen didn't achieve any fame as a football player.

Having made his Finland Under 21 debut in 05/05/08, Sixten Wirtanen has gone to make 5 appearances.

At the international level he played a total of 5 games, scored 0 goals and was nominated MoM 0 times for Finland Under 21.

He began his career at FC Helsínquia in season 2, making a total of 6 appearances.

In season 2 he joined Atoa and made 63 appearances.
In season 8 he joined F C L and made 14 appearances.
In season 9 he joined Auckland Utd and made 4 appearances.
In season 9 he joined FFS and made 10 appearances.
In season 10 he joined Falck Academy.
Was transfered to Momentum in season 10 for 0 and made 34 appearances scored 1 goals.
In season 11 he joined Puulaakarit and made 165 appearances.

Sixten Wirtanen has build a record of wins through his career:
10/09/2007 - National champion of B - 3 (Atoa)
07/04/2008 - National champion of B - 4 (Atoa)
18/06/2009 - Cup Winner (FFS)
22/06/2009 - National champion of NZFC (FFS)
24/05/2010 - National champion of Mestaruussarja (Puulaakarit)
13/09/2010 - National champion of Mestaruussarja (Puulaakarit)
29/12/2010 - Cup Winner (Puulaakarit)
15/08/2011 - National champion of Mestaruussarja (Puulaakarit)
30/11/2011 - Cup Winner (Puulaakarit)
05/12/2011 - National champion of Mestaruussarja (Puulaakarit)
26/03/2012 - National champion of Mestaruussarja (Puulaakarit)
31/10/2012 - Cup Winner (Puulaakarit)
20/02/2013 - Cup Winner (Puulaakarit)
25/02/2013 - National champion of Mestaruussarja (Puulaakarit)

Sixten Wirtanen ended his career in season 21 playing for Puulaakarit with a total of 296 career appearances, scored 1 goals, was nominated MoM 11 times.

Sixten Wirtanen entered the hall of fame of Puulaakarit.