The Records
Streaks, milestones, and the numbers with asterisk-shaped shadows.
Baseball's history, kept honestly
Baseball History Blog covers the game's past through its record book: what the numbers meant in their own era, and which comparisons across eras hold up.
From 1876 to the pitch clock
Recent
Latest articles
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Slugging Percentage in Baseball: Formula and Worked Example
How SLG is calculated from singles, doubles, triples and home runs, why it can top 1.000, what it ignores, and Aaron Judge's 2024 line worked step by step.
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Baseball Statistics Acronyms Explained
Decode batting, pitching, fielding, advanced and Statcast abbreviations, with formulas, context clues and ambiguous terms such as 1B, H and GS.
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Worst Baseball Record Ever: 1899 Cleveland Spiders
Different measures name different modern-era teams: the 2024 White Sox for losses and the 1916 Athletics for lowest winning percentage.
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Catcher Stolen Base Records by Position Filter
John Wathan leads a position-aware single-season finding, while Bresnahan, Kendall, and Realmuto lead different career categories.
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Orioles vs. MLB Turnarounds: Two-Season Win Gains
Baltimore posted a 49-win endpoint gain from 2021–2023 and improved in both annual steps—one of two sustained climbs in MLB’s selected 14-team sample.
Coverage
What we help with
The Eras
Dead ball, integration, expansion, steroids — how each rewrote the book.
The Stories
What the statistics were quietly recording while history happened.