Earned three victories, highlighted by a win at the Masters Tournament to become the sixth player to complete the career Grand Slam, joining Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Tiger Woods. Other two victories came at the AT&T Pebble Beach Pro-Am and THE PLAYERS Championship. Became the 20th player in PGA TOUR history to reach 29 career wins and the 21st player to win five or more major championships. Recorded eight top-10s, three wins and 15 made cuts in 16 starts. Qualified for the FedExCup Playoffs for the 13th consecutive season and 14th time of his career, finishing T23 in the standings after advancing to the TOUR Championship for the eighth straight year and 12th time total. Automatic qualifier for Team Europe in the Ryder Cup, his eighth consecutive appearance in the event.

At 21-under, including weekend rounds of 65-66 at Pebble Beach Golf Links, won the AT&T Pebble Beach Pro-Am by two strokes over fellow countryman Shane Lowry. Earned his 27th PGA TOUR victory in his 258th start at the age of 35 years, 8 months, 29 days. Week highlighted with an ace at the par-3 15th hole at Spyglass Hill on Thursday, becoming the first player to have an ace and go on to win that event since Justin Rose did so at the 2023 AT&T Pebble Beach Pro-Am. Recorded his third win in his season debut on TOUR (2021 THE CJ CUP, 2022 THE CJ CUP, 2025 AT&T Pebble Beach Pro-Am) and second TOUR victory in California (2015 World Golf Championships-Cadillac Match Play at TPC Harding Park). Became the sixth international winner of the AT&T Pebble Beach Pro-Am, joining Justin Rose (England/2023), Nick Taylor (Canada/2020), Vijay Singh (Fiji/2004), Brett Ogle (Australia/1993) and Bruce Crampton (Australia/1965).

Defeated J.J. Spaun in a three-hole aggregate playoff during a Monday finish to win his second PLAYERS Championship title (2019, 2025) and 28th PGA TOUR victory. Started the final round four shots of the lead and closed with a 68 to tie Spaun at 12-under 276 in regulation. Due to darkness, the playoff was played Monday. Became the eighth multiple winner of THE PLAYERS. Improved his playoff record to 4-2.

Won his first Masters Tournament, fifth major championship and 29th PGA TOUR title in his 263rd start at the age of 35 years, 11 months, 9 days. Defeated Justin Rose with a birdie-3 on the first playoff hole (No. 18). In his 17th Masters appearance, completed career Grand Slam, joining Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Tiger Woods. Became the 21st player to win five or more major championship titles and first player from Northern Ireland to win the Masters. With the victory, became the second player to win the Masters with a double bogey or worse on first hole of final round (Nick Faldo/1990). Marked the third player to come from seven strokes back after the first round to win the Masters (Nick Faldo/1990, Tiger Woods/2005) and third player to win THE PLAYERS Championship and the Masters Tournament in the same year (Tiger Woods/2001, Scottie Scheffler/2024). Converted for the 12th time in his 20th 54-hole lead/co-lead in an individual stroke play event on TOUR.