He originally played for Claremont in the West Australian Football League.

[3] He made his AFL debut in the twenty-two point win against Port Adelaide at Etihad Stadium in round 4 of the 2018 season.

[4] On 4 September 2019, Guelfi signed a contract extension with Essendon until the end of the 2021 season.

[5] In 2022, Guelfi enjoyed a career best season establishing himself as a quality pressure forward and culminating with a third placed finish in the club's Best and Fairest.

This Australian rules football biography of a person born in the 1990s is a stub.