Jon Rahm was quick to put a spectator in their place on Wednesday afternoon after being irritated by their behaviour. The Spaniard is known for his fiery temper on the course and has already given fans at Royal Portrush a taste of his wrath. Rahm was angered at one bystander for apparently whistling during his backswing while he teed off at the par-four 11th hole. The two-time Major champion watched as his shot sank into a nasty patch of rough to the right of the fairway, leading to his outburst. 'Really? Whistling? Great time,' he started as he gestured at the audience. 'Right in my backswing. Very smart, whoever it was.' Due to the high levels of concentration required, it is considered bad etiquette to distract a golfer during their swing, much like when a tennis player is serving. And that hole didn't end up going to plan for 'Rahmbo,' as he had to settle for a bogey. Rahm is one of the favourites to take home the Claret Jug this year, though the likes of Scottie Scheffler, Rory McIlroy, Xander Schauffele, and Bryseon DeChambeau won't be going down without a fight either. At least this outburst - which was actually delivered in quite measured tones - was lower-key than some of his others. At the Masters in April, the 2023 champion almost snapped his club in fury. On the ninth tee, Rahm fired his tee shot deep into the woods on the right edge of the fairway. As he watched his ball soar way off course, he dropped his club in disbelief before kicking it. Rahm was already two-over for the day as it seemed the errant drive was almost the final straw as he then picked up the club and almost snapped it between his two hands. Since jumping ship to join LIV on a reported $500million deal in 2023, Rahm has struggled on golf's greatest stages. He finished tied for 45th at the 2024 Masters, before missing the cut at the PGA Championship at Valhalla. He didn't even have chance to tee it up at Pinehurst, withdrawing from the US Open due to a toe injury. Rahm did manage to bounce back at The Open last year, finishing tied for seventh at Royal Troon. But he is still searching for a first major title since defecting to LIV Golf.