Magunazelaia scored his first senior goals on 8 December 2020, netting a hat-trick for the C's in a 5–2 home success over JD Somorrostro.[4] During the 2020–21 campaign, he scored five goals in 24 appearances as the C-side achieved promotion to Segunda División RFEF.
Magunazelaia made his professional debut with the reserves on 18 September 2021, starting and scoring the opener in a 1–1 away loss against Real Zaragoza in the Segunda División.[5] He netted a further two goals in 26 appearances for the B-team during the season, suffering team relegation.
On 11 January 2023, Magunazelaia renewed his contract with the Txuri-urdin until 2026.[6] He was definitely promoted to the main squad ahead of the 2024–25 season, wearing the number 25 jersey.[7]
Career statistics
As of match played 21 November 2024
Appearances and goals by club, season and competition