Mitchell Marsh is the younger brother of Shaun Marsh, a left-handed top-order batsman, and the son of Australia's former opener, Geoff Marsh. Unlike his father and elder brother, Mitchell has worked on the art of fast bowling. He classifies as a hard-hitting all-rounder, who bats in the middle-order. He started playing competitive cricket at the age of 17 and plays for Western Australia in the domestic circuit. Even before he made his international debut, he was roped in by the IPL side Deccan Chargers in 2010. He eventually went on to play for his country against South Africa in a T20I at Wanderers in 2011.
He became a bit of a T20 agent at a very young age. He was drafted into the Pune Warriors squad in 2011 and he was with them until 2013. He also played for the Nagenahira Nagas in the Sri Lanka Premier League. Back home in Australia, he has been a regular member of the side for Perth Scorchers in the Big Bash League since its inception in 2011.
