Born in the small coastal town of Barrika in Spain, he played college golf at Arizona State and became World Amateur Number One in 2015. Finished low amateur at the 2016 U.S. Open before turning professional.

Enjoyed a stellar first season on the European Tour in 2017 - in which he was named Sir Henry Cotton Rookie of the Year - becoming the first player to win multiple Rolex Series events with victories at the Dubai Duty Free Irish Open hosted by the Rory Foundation and the season-ending DP World Tour Championship, Dubai. Also won his first PGA TOUR title at the Farmers Insurance Open that same year.

He added a second Dubai Duty Free Irish Open title to his trophy cabinet at Lahinch Golf Club in 2019 to become the first three-time Rolex Series winner. Made his Ryder Cup debut in 2018 and beat Tiger Woods in the Sunday Singles as Thomas Bjørn's side stormed to an historic victory at Le Golf National.

Earlier that year, he won on home soil for the first time as a professional, emerging victorious at the Open de España. Defended his Open de España title in 2019, winning his fifth European Tour title in just his 39th appearance - ten fewer than Seve Ballesteros.

Won the 2019 Race to Dubai after his victory at the season-ending DP World Tour Championship.

He sent records tumbling at the 2020 WGC-Mexico Championship, carding a ten under par round of 61, which included a hole-in-one on the par-3 17th at Chapultepec Golf Club, to record the lowest round of his career and the joint lowest round in the history of the World Golf Championships.

Those wins came in a year when he sprung to global prominence and rose to become a staple in the world's top ten, winning on the PGA TOUR at the Memorial Tournament and BMW Championship.

Won his first Major Championship in 2021, becoming the first player from Spain to win the U.S. Open. Rahm started the final day three strokes back, and birdies on the 17th and 18th holes at Torrey Pines gave him a one-stroke victory over Louis Oosthuizen. The Spaniard finished no lower than T8 in the four Majors in 2021, winning the U.S. Open, T3 at The Open, T5 at the Masters and T8 at the US PGA Championship.

Was Europe's top performer at the 2021 Ryder Cup, earning 3.5 points as he formed a formidable partnership with Sergio Garcia, whom he cites as a hero and influence.

In 2022, Rahm emulated Ballesteros's feat of winning three Open de España titles in the modern era as he won his third national Open in just four appearances. He also become the first player to win the DP World Tour Championship, Dubai on three occasions as he finished two strokes clear of a world-class field at Jumeirah Golf Estates.

Won his second Major Championship at the 2023 Masters Tournament, becoming the first player from Europe to have won both the U.S. Open and the Masters. After a rain-affected third round resumed on Sunday morning, Rahm overturned a four-stroke deficit with 30 holes left to play, eventually finishing two strokes clear of Brooks Koepka at Augusta National. It was his fourth win of the 2023 PGA TOUR season.

Earned three points from four matches as he made his third Ryder Cup appearance at Marco Simone, helping Europe regain the trophy. Hit Europe’s opening tee shot on Friday afternoon and went head-to-head with World Number One Scottie Scheffler in the Sunday Singles, earning half a point after a birdie on the last. His stand-out performance came in the Friday four-ball session where he finished eagle-par-eagle to win an unlikely half point.