He is an Indigenous Australian and the nephew of former Cronulla-Sutherland Sharks and South Sydney Rabbitohs player David Peachey.

[22] In the next match, in Round 11 against the Gold Coast Titans, with scores at 24-all, Peachey went from hero to zero after he dropped a pass from Peter Wallace and didn't dive on the ball.

Gold Coast halfback Ashley Taylor picked up the ball and raced downfield before Anthony Don acrobatically dived over in the corner one play later to seal a bizarre 28–24 win at Penrith Stadium.

[23] In July 2016, Peachey was axed from the Penrith squad for their Round 18 clash with the Cronulla-Sutherland Sharks after he returned training late after a night out in Cronulla.

The ball appeared to bounce off Peachey's arm into his hand from a rebound off a grubber kick from teammate Bryce Cartwright, dived over the try line which was given the green light by the video referee bunker and Penrith would be 22–10 winners and advance into Week 2 of the finals series.

On 2 March 2018, Peachey announced that he signed a three-year deal with the Gold Coast Titans worth $1.5 million, starting from 2019.

Peachey made a total of 21 appearances for the Gold Coast in the 2019 NRL season as the club endured a horror year on and off the field.

During the halfway mark of the season, head coach Garth Brennan was sacked by the club after a string of poor results.

[34][35] Peachey played 20 games for the Gold Coast in the 2020 NRL season as the club finished ninth on the table and missed out on the finals.

[36] In the 2021 Finals Series, Peachey was sent to the sin bin and later missed a field goal attempt in the Gold Coast's 25–24 loss against the Sydney Roosters which ended their season.

[39] Peachey played a total of 13 matches for the Wests Tigers in the 2022 NRL season as the club finished bottom of the table and claimed the Wooden Spoon for the first time.

[40] On 20 October, Peachey joined former club and reigning premiers Penrith in a swap deal with Charlie Staines.

[45] Peachey would be the 18th man in Penrith's 2023 NRL Grand Final victory over Brisbane, winning his first premiership ring.