Baseball cards were included in boxes of Cracker Jack in 1914 and 1915.
Notes on verification
Confirmed by multiple independent hobby/research sources including SABR, PSA CardFacts, and CardboardConnection, all agreeing on distribution details for 1914 and 1915. [tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- Would Baseball have Become America's National Pastime Without ... (seed:culture_and_philosophy)
- https://sabr.org/journal/article/1914-15-cracker-jack-baseball-cards-2/ (corroboration)
- https://www.psacard.com/cardfacts/baseball-cards/1915-cracker-jack/130 (corroboration)
- https://www.cardboardconnection.com/1915-cracker-jack-baseball-cards (corroboration)