Early career Cini came through the
Penrith Panthers junior system playing in their
SG Ball championship winning team of 2018, he was educated at
St Dominic's College, Penrith where he made the
Australian Schoolboys rugby league team in that same year.
2021 Cini was named to his debut in round 8 for the Tigers, starting on the wing against the
St. George Illawarra Dragons away at
WIN Stadium. At the time he was leading the lower
NSW Cup competition in post-contact metres, tackle breaks, runs and run metres. He scored a try and had another disallowed as he "starred" in his first game. Cini played a total of four matches for the
Wests Tigers in the
2021 NRL season as the club finished 13th and missed the finals. In December 2021, Cini was released by the Wests Tigers and he joined
NSW Cup side
Newtown.
2022 Before the start of the 2022 NSW Cup season, Cini departed Newtown and signed a contract to join
Parramatta's NSW Cup team.
2023 Cini made no appearances for Parramatta's first grade team in 2023. He would instead play for the clubs NSW Cup side making 20 appearances and scoring eleven tries.
2024 On 21 August, it was announced that Cini would join
Castleford Tigers in the
Super League on a two-year deal from 2025. Cini made no first-grade appearances for Parramatta in 2024, instead featuring for the club's NSW Cup team.
2025 Cini was assigned squad number 3 for Castleford and made his debut on 9 February against
Bradford in the
Challenge Cup. In round 1 of the Super League campaign, Cini scored a try in the Tigers' 19–18 golden point extra-time defeat against
Hull Kingston Rovers. Having began the season playing as left centre, Cini moved onto the right edge from round 4 in a swap with
Sam Wood. Following a standout performance filling in at fullback in round 14, head coach
Danny McGuire singled Cini out for praise, stating that he had "been really good for us all year." Cini was sidelined for six weeks by a facial fracture suffered against
St Helens in August. He made 22 appearances throughout the
2025 season as the club finished 11th on the table.
2026 Cini was ruled out of the opening rounds of the
2026 season by a hamstring injury sustained during pre-season training. For six matches following his return to the side in round 3, Cini deputised at fullback due to injuries to
Blake Taaffe and
Fletcher Rooney. With Castleford in the market for a fullback replacement, it was speculated that Cini could transfer to
Bradford in April, though in round 10 he returned to the team in his primary position of right centre. ==Statistics==