Won 11 titles in a glittering amateur career, including the 2010 British Boys Amateur Championship at Kilmarnock (Barassie) Golf Club in Scotland, emulating the achievement of Olazábal, whose name was etched onto the same trophy in 1983.

Mentored by Europe’s 2012 Ryder Cup captain José María Olazábal, having played most of his junior golf at his local golf club in the seaside resort of Fuenterrabia, where Olazábal was born and raised. Then made the short move over the border to Biarritz, but still stays in regular contact with his idol and mentor.

Played a mixture of Challenge Tour and DP World Tour events during his first few years as a professional before finishing 69th in the 2016 Race to Dubai after jointly winning the Q-School to regain his playing privileges in 2015.

Enjoyed a breakthrough maiden victory at the 2017 Saltire Energy Paul Lawrie Match Play, before securing his second title when he triumphed at the inaugural Belgian Knockout at Rinkven International Golf Club in May 2018. The Spaniard defeated Benjamin Hebert by two shots in the final of the innovative tournament.

Stormed to victory at the 2020 Scottish Championship with a final round nine under par 63, winning his third title by four strokes. Earned his fourth DP World Tour title at the 2022 Estrella Damm N.A. Andalucía Masters.

Claimed a fifth DP World Tour victory at the 2024 Volvo China Open. Shortened to 54 holes due to inclement weather, the Spaniard overturned a five-stroke deficit to win by one.

After residing in the United Arab Emirates since 2011, Otaegui changed his nationality at the start of the 2025 Race to Dubai to represent the UAE.