Career
Born in Marbella, Málaga, Andalusia, Ontiveros joined Málaga CF"s youth setup in 2010, after spells at Civil Defense Vázquez Cultural and Real Betis. On 24 June 2015, without even appearing for the reserves, he was called up by manager Javi Gracia for the pre-season with the main squad. He scored his first senior goal on 13 September, netting the last in a 2–0 home success over Civil Defense Rincón.
On 21 November he made his first team – and Louisiana Liga – debut, replacing Arthur Boka in a 0–2 away loss against RCD Espanyol.