He competes in longtrack and Grasstrack. Jannick has been Long Track World Champion once in 2015 and European Grasstrack Champion three time in 2013, 2014 and 2015.

In 2023, he was part of the Netherlands national long track team team, along with Romano Hummel, Dave Meijerink and Mika Meijer, that won the 2023 Team Long Track World Championship. It was the third time that de Jong had won the event.^[2]

World Longtrack Championship edit

Grand-Prix edit

• 2005 - 4 apps (12th) 31pts
• 2006 - 2 apps (17th) 10pts
• 2007 - 3 apps (11th) 28pts
• 2008 - 4 apps (9th) 33pts
• 2009 - 4 apps (10th) 42pts
• 2010 - 6 apps (9th) 70pts
• 2011 - 0 apps
• 2012 - 6 apps (9th) 74pts
• 2013 - 6 apps (Second) 97pts
• 2014 - 4 apps (Second) 72pts
• 2015 - 4 apps (First) 75pts
• 2016 - 5 apps (Second) 101pts
• 2017 - 1 apps (15th) 24pts
• 2022 - 1 apps (19th) 10pts

Best Grand-Prix Results edit

•   Eenrum Second 2016, Third 2013
•   Forssa First 2016, Third 2013
•   Herxheim First 2014, 2017
•   Marmande First 2014, Second 2010, 2013
•   Morizes First 2015
•   Mühldorf Third 2016
•   Vechta Second 2016

Team Championship edit

• 2007   Morizes (5th) 32pts (Rode with Dirk Fabriek, Theo Pijper, Erik Eijbergen)
• 2008   Wertle (Second) 45pts (Rode with Dirk Fabriek, Erik Eijbergen, Mark Stiekema)
• 2009   Eenrum (Second) 46pts (Rode with Dirk Fabriek, Theo Pijper, Mark Stiekema)
• 2011   Scheeßel (Second) 38pts (Rode with Sjoerd Rozenberg, Mark Stiekema, Jeffrey Woortman)
• 2013   Folkestone (First) 65pts (Rode with Dirk Fabriek, Theo Pijper, Mark Stiekema))
• 2014   Forssa (Second) 41pts (Rode with Dirk Fabriek, Theo Pijper, Henry van der Steen)
• 2015   Mühldorf (Fifth) 31pts (Rode with Henry van der Steen & Sjoerd Rozenberg)
• 2016   Marianske Lazne (First) 46pts (Rode with Theo Pijper, Dirk Fabriek, Romano Hummel)
• 2023   Roden (First) 64pts (Rode with Dave Meijerink, Mika Meijer, Romano Hummel)

Grasstrack European Championship edit

Finalist

• 2004   Eenrum (10th) 11pts
• 2005   Schwarme (17th) 4pts
• 2006   La Reole (9th) 10pts
• 2007   Folkestone (7th) 11pts
• 2008   Siddeburen (11th) 8pts
• 2009   Berghaupten (7th) 14pts
• 2010   La Reole (5th) 12pts
• 2011   Skegness (Second) 10pts
• 2012   Eenrum (Third) 16pts
• 2013   Bielefeld (Champion) 19pts
• 2014   St. Macaire (Champion) 20pts
• 2015   Staphorst (Champion) 19pts
• 2016   Folkestone (6th) 17pts

Dutch Grasstrack Championship edit

• 2003 (Third)
• 2004 (Champion)
• 2005 (8th)
• 2006 (Champion)
• 2007 (Champion)
• 2008 (Third)
• 2009 (6th)
• 2010 (Third)
• 2011 (Champion)
• 2012 (Second)
• 2013 (Champion)
• 2014 (Champion)
• 2015 (Champion)
• 2016 (Champion)

• Nouvelles
• [1]
• Jannick rides to the front
• Long Track Racing: de Jong wins first Grand Prix round in Herxheim | | Worldspeedway