After emerging through the ranks of CDC Moscardó in his hometown of Madrid, Olías went straight into La Liga in 1989 after signing with CD Málaga,[1] but he never appeared in competitive games for the former club during his spell, being consecutively loaned.
[2][3][4] At the end of 1991–92, he achieved promotion to Segunda División with CA Marbella; in the following season, he scored a career-best seven goals to help the team to a comfortable seventh-place finish.
[2] In the following campaign he featured relatively less – Krešić was also fired in the final stretch, being replaced by Lorenzo Serra Ferrer as the side eventually finished third;[2] his first game in the Spanish top flight took place on 18 September 1994 when he came on as a 55th-minute substitute for Alexis Trujillo in a 1–0 away loss against Athletic Bilbao,[5] and his maiden goal in the competition occurred on 6 November in a 1–1 home draw with Valencia CF.
In 1996–97 he netted five times in the league,[2] including a solo effort in the Seville derby which concluded a 3–0 away win over Sevilla FC;[7] during his spell, he was affectionately known as Monsignor by fans due to the lack of hair in his crown.
[2] Aged 30, Olías returned to the second tier in 1999, signing with UD Las Palmas and again reuniting with Krešić (as well as former Betis teammates Robert Jarni and Jaime Quesada).