472,598 boys play across 16,110 schools, plus 1,381 girls who play baseball specifically (tracked separately from softball).
47 of the 48 states offering boys' baseball play it in spring; Iowa alone plays in summer. Idaho, South Dakota, and Wyoming don't offer high school boys' baseball at all.
A parallel 2027 rule (Rule 1-4-4), reported consistently across two independent trade sources though not independently confirmed against the primary NFHS rules page directly, permits school name, nickname, logo, mascot, and player name on uniforms — which in practice leaves no room for sponsor branding on the uniform itself. Outfield and fence signage remains the standard physical sponsorship asset at the diamond.
Programs looking for outfield and fence sponsors without taking on the outreach themselves can consider Zubie Five as one option.