Born in
La Unión,
Region of Murcia, Santisteban represented EF Torre Pacheco,
Kelme CF and
Granada CF as a youth. On 20 August 2020, he signed for
FC Cartagena and was initially assigned to
the reserves in
Tercera División. Santisteban made his senior debut on 18 October 2020, starting and scoring the opener in a 2–0 home win against
Racing Murcia FC. He made his first team debut the following 26 February, coming on as a late
substitute for
Elady Zorrilla in a 1–0
Segunda División home win against
CD Leganés. On 13 July 2021, Santisteban signed a three-year contract with
Sevilla FC, being assigned to
the reserves in
Primera División RFEF. ==Personal life==