What happened: Bryce Harper said Home Run Derby balls are juiced, telling reporters "everybody knows it." MLB pushed back, saying the balls used in the event are no different than those used in the regular season and are treated no differently.

Why it matters: The dispute puts Harper's final Home Run Derby appearance at the center of a fresh disagreement between a marquee player and the league over ball consistency. MLB's direct rebuttal signals it is treating the claim as a credibility issue, not letting it stand unanswered.

What to watch: MLB says it will address the distance discrepancies and other explanations Harper raised; the Derby is set for All-Star festivities.