Eli joined the Academy as an U8, developing through the different age groups with the Club over the subsequent years.

King was a consistent member of the U18 squad across the 2019/20 and 2020/21 seasons, and made the permanent step-up to U21 level from July 2021.

The midfielder made his First Team debut in October 2021, coming off the substitutes bench against Middlesbrough at Cardiff City Stadium. He has gained senior experience in recent seasons on loan with Crewe Alexandra, Morecambe and Ross County.