Having spent most of his 15-year professional career with Athletic Bilbao, he was crowned La Liga's Pichichi in 1968, winning two Copa del Rey and scoring more than 100 official goals with his main club.

Born in Sestao, Biscay, Uriarte was promoted to Basque giants Athletic Bilbao's first team at only 17, making his La Liga debut on 23 September 1962 in a 2–0 away loss against CD Málaga.

Uriarte scored a career-best 22 goals in only 24 league games (35/28 overall) in the 1967–68 campaign, helping Athletic to finish in seventh place; on 31 December 1967, he contributed five to an 8–0 home demolition of Real Betis.

[3] In the following year he conquered the first of his two Copa del Rey with the club, and left in 1974 with 389 competitive appearances and 121 goals.

[2] Uriarte earned nine caps for Spain in four years, his debut coming on 28 February 1968 in a friendly with Sweden in Seville.