[3] The following year Coleman-Jones made a switch to play with the Unley Jets and joined the South Adelaide development squad where he stayed for two seasons, before returning to Sturt in 2015.

[13] Coleman-Jones' final underage season was cut short when he underwent minor knee surgery to repair a partially-torn left patellar tendon that was causing him soreness during the championships.

[28] Despite unexceptional output statistically, Coleman-Jones earned praise from VFL assistant coach Xavier Clarke for "playing his role brilliantly" in early June.

[30] Coleman-Jones remained as the team's lead ruck in Soldo's absence for the following month, with VFL head coach Craig McRae highlighting it as a key development opportunity.

[34] After finishing the regular season as minor premiers, Richmond's reserves side suffered a loss in a home qualifying final against Williamstown.

[36] Coleman-Jones finished 2018 having failed to earn an AFL debut and instead played 16 games and kicked 14 goals with the club's reserves side in the VFL.

[37] Before the beginning of his second season at the club, Coleman-Jones signed a two-year contract extension with Richmond, despite being yet to debut and with one year still remaining on his existing deal.

[42] In early April he kicked two goals and was among Richmond's best players in a win over Geelong's reserves in what VFL assistant coach Xavier Clarke called "one of his best games for the club.

[48] But an immediate one-week suspension to Soldo meant Coleman-Jones would be handed yet more responsibility, named to make his AFL debut in the marquee Dreamtime at the 'G match in round 10 of the 2019 season.

[52] After being rested for one week, Coleman-Jones began to stand out with his contested marking prowess while playing as lead ruck in the VFL side in late June.

[61] Coleman-Jones contributed seven marks and 14 disposals to the Richmond VFL side that defeated Williamstown the following week, as the club won its first reserves grade premiership since 1997.

[63][64] After an impressive off-season in which he added significant muscle weight, Coleman-Jones earned selection in place of the injured Toby Nankervis as Richmond's relief ruck during both matches of the 2020 pre-season series.

[68][69][70] With Nankervis returning to fitness just in time, Coleman-Jones could not earn selection to AFL level when the season began a fortnight later, and was instead a non-playing emergency for the win over Carlton that was played without crowds in attendance due to public health prohibitions on large gatherings.

[80][81] After three more scratch matches at reserves level, Coleman-Jones moved with the main playing group when the club was relocated to the Gold Coast in response to a virus outbreak in Melbourne.

[86][87] He made a return to fitness by early September but before he could compete for AFL selection, Coleman-Jones committed a breach of the league's COVID-19 safety protocols that saw him handed a league-imposed season-ending 10-match suspension.

[89] The investigation ultimately found Coleman-Jones and Stack had committed three breaches, including engaging in the altercation, travelling in an Uber and visiting a "non-approved venue", which was named in media reports as a Gold Coast strip club.