Astle began his cricket career as an opening batsman, representing New Zealand in the 2006 Under-19 Cricket World Cup, but over time playing first-class cricket for Canterbury, he morphed into a bowling all-rounder. He made his Test cricket debut for New Zealand in 2012 in Sri Lanka, but did not play another international match until 2015.
Astle began his cricket career as an opening batsman, representing New Zealand in the 2006 Under-19 Cricket World Cup, but over time transitioned to a bowling all-rounder. He made his Test cricket debut for New Zealand in 2012 in Sri Lanka, but did not play another international match until 2015.