For MLB's second generation players, love of game tops genetics – and science agrees In Father's Day nature vs. nurture debate, MLB's Sons know it's not just their genes.

MLB teams don't always wear light blue uniforms on Father's Day. For example, this season the uniforms look the same as always, but players can choose to wear light blue arm bands, headbands, etc ...

For MLB's second generation players, love of game tops genetics – and science agrees In Father's Day nature vs. nurture debate, MLB's Sons know it's not just their genes.