The Harlequins fly-half burst onto the scene as a teenager, and has become one of rugby’s most exciting and creative playmakers. Born and raised in Asia, Marcus began playing for the Centaurs Club in Singapore at the age of 7 before moving to Brighton at 13, earning a sports scholarship to Brighton College and captaining the 1st XV. He progressed through Harlequins’ academy, making his Premiership debut in 2017 aged just 18, and has since surpassed 1,500 points for the club. Known for his attacking flair, sharp footwork, and precise goal-kicking, Marcus helped Quins to the 2020–21 Premiership title and was the league’s top scorer. He made his England debut in 2021, has earned over 40 caps, starred at the 2023 Rugby World Cup, and featured on the 2021 and 2025 British & Irish Lions tours. An Optimum Nutrition ambassador since 2022, Marcus embodies the pursuit of performance and recovery at the highest level.

Optimum Nutrition’s GOLD STANDARD 100% WHEY is the world’s best-selling whey protein. It delivers 24 g of whey protein to support muscle growth. After training, your body uses protein to help repair and rebuild muscle fibres. Each great tasting serving contains 24 g of premium whey protein to support muscle growth and 5.5 g of naturally occurring BCAAs. All with just 1.4 g of fat, 0.7 g of sugars, and with 1.3 g of carbs.