[5] Hynes was signed by the Manly-Warringah Sea Eagles NRL Under-20s team in 2015,[5] before spending the next two seasons (2017–18) with the Mackay Cutters, where he played 42 Queensland Cup matches.

First-grade debut and premiership season (2019-20)In 2019, Hynes signed with the Melbourne Storm transferring to their feeder club Sunshine Coast Falcons to continue playing in the Queensland Cup.

[7] Following the cancellation of the 2020 Queensland Cup, Hynes played 11 NRL matches in a utility role, mostly from the interchange bench, signing a further one year contract extension in September 2020.

[9] On this day, he wrote his name in the history books as the first player in the NRL Era to be selected in a grand final but not play a single minute.

[11] After a solid start to the season for the Melbourne Storm, Hynes was named in the extended NSW Blues side for game 3 of the 2021 State of Origin series.

[12] Elevation to one of the league's top superstars, Dally M Medal Winner (2022) In round 1 of the 2022 NRL season, Hynes made his club debut for Cronulla-Sutherland in their 24-19 loss against Canberra.

[27] On 11 July, it was announced that Hynes would miss eight weeks with a leg injury which he sustained in a training drill before Cronulla's round 19 game against the Wests Tigers.