Shohei Otani is perhaps the most talked-about player in baseball, even though he has never played a game at the major league level. Called the “Japanese Babe Ruth“, he is dominating Japanese baseball both as an outfielder (leading the Pacific league in OPS in 2016) and as a pitcher (leading the same league in ERA)
Otani is 23 years old, and is under contract in the NPB (with the Hokkaido Nippon-Ham Fighters in Sapporo), so if he *does* want to come to the MLB, he will be subject to baseball’s posting system.