Raith Rovers Kieron had previously played for Glenrothes Strollers before a move to his boyhood club
Raith Rovers. He broke into the first team aged only 16 in the tailend of the 2018–19 season as he made four appearances for the
Fife-based club. He then went on to make 35 appearances in all competitions the following season, scoring 10 goals and helping the club to a
Scottish League One title and promotion to the
Championship.
Fulham Kieron officially joined
Fulham on 1 July 2020 after a pre-contract agreement that was made the previous February. On 3 July 2023, he re-joined Northampton – now promoted to
EFL League One – on another season-long loan. He played a pivotal role in the club's campaign, including scoring their goal of the season. In his two seasons at the club, he made 81 appearances in the league, scoring 14 goals.
Hibernian Bowie signed for
Scottish Premiership club
Hibernian on a four-year contract in August 2024, moving from Fulham for what Hibs described as "a significant fee". He missed about four months of the 2024–25 season due to a hamstring injury sustained while playing for the Scotland under-21 team in September 2024. Hibs rejected an offer from
Serie A club
Hellas Verona in January 2026, but later that month accepted a second offer which set a new club record for the transfer fee received.
Hellas Verona Bowie signed for
Hellas Verona on 30 January 2026, agreeing a contract that is due to run until the middle of 2030. ==International career==