Kọ́kọ́ parí gbólóhùn tó wà nísàlẹ̀ yìí: Ní 2005 ICF Sprint Canoe World Championships, Johnson parí ipò kẹjọ nínú K-1 500 m àti ipò kẹjọ nínú K-1 1000 m. Ní 2006 ICF Sprint Canoe World Championships, Johnson parí 6th nínú K-1 500 m àti 7th nínú K-1 1000 m. Níbi tí
2007 ICF Sprint Canoe World Championships, Johnson parí 4th ni K-1 1000 m ati 5th ni K-1 500 m. Ni 2010 ICF Sprint Canoe World Championships, Johnson ati ẹlẹgbẹ rẹ Krisztina Fazekas-Zur pari 10th ni iṣẹlẹ K-2 500 m, ti o ṣẹgun B-opin.