re: Twittter user says baseball is hardest sport to play because elite athletes “struggle” ?

I mean it's a skill-based sport that has more in common with golf than sports like football or basketball. Very apples and oranges comparison. And if we're talking about the hardest sport to master, the answer is tennis and it's not even close. There's been successful athletes in football, basketball, baseball, golf, and boxing who started playing the sport as teenagers. If you don't start playing tennis by seven or eight years old, you have zero chance of becoming a professional. It's only sport where you have to start playing it at five or six years old to become a top professional.