Originally from Adelaide, Lock moved to Queensland and played for Southport as a junior.
He was recruited to the newly established Gold Coast Football Club as a zone selection at the end of 2008.
He won the club best and fairest in its TAC Cup season.
[1] When Gold Coast joined the AFL for the 2011 season, Gary Ablett, Jr. took over the captaincy from Lock.
He played with the VFL's Box Hill from 2012 until 2016, the VAFA's Old Carey from 2017 until 2019, the EDFL's East Keilor from the abandoned 2020 season[3] until 2022, and Old Carey again from 2023.