[15] Capewell made his first appearance of the 2017 NRL season in round 2 against the Canberra Raiders, playing at centre in Cronulla's 42–16 victory.

Capewell made nineteen appearances for Cronulla in the 2018 NRL season as the club finished fourth on the table.

[16] Capewell made twenty-five appearances for Cronulla in the 2019 NRL season as the club finished seventh on the table and qualified for the finals.

In round 5, Capewell injured his MCL in the first minute of the game against the Parramatta Eels, in a 16–10 loss missing twelve weeks.

In round 3 of the 2021 NRL season against Melbourne in the grand final rematch, he scored the match winning try in a 12–10 victory.

[25] In December 2020, Capewell revealed that several years earlier, he had been involved in a pornographic film with another man where he performed a sexual act.

Capewell, who at the time was twenty years old and playing for the Ipswich Jets, was taking part in a photo-shoot for a sports clothing and underwear company before it turned to nude photos then an adult movie.