Many players and caddies are either wearing yellow items of clothing or a yellow ribbon during the final round of the Memorial Tournament, but why?It's to help raise money for charity from Children's Miracle Network Hospitals. The 'Play Yellow' movement is spearheaded by Jack and Barbara Nicklaus, who host the Muirfield Village event, in partnership with the PGA Tour and Children's Miracle Network Hospitals.“'Play Yellow for Children’s Hospitals strives to bring the entire golf world together to help the 10 million kids treated at local children’s hospitals each year," the Play Yellow website states.It has been running since 2019, and players in all rounds of the tournament do their bit by wearing yellow shirts, caps or ribbons. Before the 2024 event, Nicklaus spoke about the campaign and revealed it had surpassed its initial $100m target.He said: "So we started on this program and we passed, after about three and a half years, we passed about 130 million. And so I don't know what leve...