2-4-1 comes from the expression "Life's 2 Short 4 Just 1 Sport" and has become synonomous with being a multisport athlete, or someone who rises to a high level in their primary sport by growing up playing multiple sports (eg. Roger Federer, Patrick Mahomes, Wayne Gretzky, Abby Wombach).
That kid is clearly a 2-4-1er. What an athlete.