Born in Melbourne to a Zimbabwean father and an Australian mother, Mzungu moved to Perth, Western Australia, at the age of nine.

Fremantle had originally intended to rookie list him, but decided to obtain him via a trade after his good form in the 2010 WAFL season.

[7] However, in Fremantle's final pre-season game he damaged his knee medial ligament[8] He returned to football 10 weeks later, to be selected directly to the AFL, rather than for Perth in the WAFL.

He was selected as the substitute player[10] and only played the final quarter, replacing Hayden Ballantyne who suffered from a corked thigh (quadriceps contusion).

[13] After playing four games for Greater Western Sydney, Mzungu announced his retirement following their preliminary final exit to the 2017 AFL season.