Michael Harris II. Nasim Nuñez. Kyren Paris. Chandler Simpson.

What do all of these players have in common? Two things: They all rank in the top 100 for baserunning sprint speed and are former Breakthrough Series participants.

It’s no accident that these players were all part of the MLB Develops pipeline, where they first honed their speed and skills and created their path to the big leagues.

The Breakthrough Series, which is currently taking place at the Jackie Robinson Training Complex in Vero Beach, Fla., features dozens of young, elite high-school athletes hoping to emulate the likes of Harris and Simpson.

Consider, for example, Ace Sapp, an outfielder in the class of 2027. He looks up to pros like Harris and Simpson, who are paving the way for the next generation of big le

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