He then joined
Hartpury RFC during the 2015–16 season where at senior level, during the 2016–17 season, he had a breakthrough campaign as he has played his part in a season for the leaders in
National League 1, where he helped them earn promotion to the
RFU Championship. On 2 March 2017, Polledri signed his first professional contract with
Gloucester Rugby in
Premiership Rugby; a three-year deal ahead of the 2017–18 season. In December 2017, he was awarded Try of the week for his try in Round 10 against
London Irish. He also won Gloucester Rugby's Young Player of the Season Award for the 2017–18 season and the Player of the Season for the 2019–20 season. After suffering a knee ligament injury that led Polledri out of action for nearly 18 months, he has signed a contract extension to stay with Gloucester for the 2022–23 season. In March 2023, Gloucester Rugby confirmed that Polledri would depart the club at the end of the 2023–24 season to join
Zebre. He made his debut in Round 1 of the 2023–24 season of
EPCR Challenge Cup against the . He played with Zebre until March 2024. ==International career==