Mordecai Brown vs Jack Chesbro: Career Stats Comparison
Mordecai Brown has the better career line of the two, leading 10 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Mordecai Brown played 1903–1916 as a pitcher; Jack Chesbro played 1899–1909 as a pitcher.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
Mordecai Brown (1903–1916) and Jack Chesbro (1899–1909) — breaking in during the 1900s and the 1890s respectively, so they pitched against very different hitting environments. Mordecai Brown finished with 239 wins and 1,375 strikeouts; Jack Chesbro finished with 198 wins and 1,265 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Mordecai Brown, with 2.06 to Jack Chesbro's 2.68.
- Who won more games? Mordecai Brown, with 239 to Jack Chesbro's 198.
- Who recorded more strikeouts? Mordecai Brown, with 1,375 to Jack Chesbro's 1,265.
- Who had the better WHIP? Mordecai Brown, with 1.07 to Jack Chesbro's 1.15.
- Who pitched more innings? Mordecai Brown, with 3,172.1 to Jack Chesbro's 2,896.2.
- Who threw more shutouts? Mordecai Brown, with 55 to Jack Chesbro's 35.
- Who has the higher career Pitcher PIV? Mordecai Brown, with 31,501 career Pitcher PIV to Jack Chesbro's 22,639.
Mordecai Brown
Jack Chesbro
Career Stats Side-by-Side
Every cell below is a career total or career rate. Cells highlighted in green mark the player who leads that line. Lower ERA, WHIP and BB/9 lead; higher K/9 leads. 12 of the 16 lines below are scored; the other 4 are counting totals on which fewer is not an achievement, so no one is awarded them. Totals where fewer is not an achievement -- losses, walks and hits allowed -- are left unmarked, because they track how long someone pitched rather than how well. Rate stats are not era-adjusted, and the 1900s and the 1890s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Mordecai Brown | Jack Chesbro |
|---|---|---|
| Wins | Leads: 239 | 198 |
| Losses not scored | 130 | 132 |
| Games | Leads: 481 | 392 |
| Games Started | 332 | 332 |
| Complete Games | Leads: 271 | 260 |
| Shutouts | Leads: 55 | 35 |
| Saves | Leads: 49 | 5 |
| Strikeouts | Leads: 1,375 | 1,265 |
| Walks not scored | 673 | 690 |
| Hits Allowed not scored | 2,708 | 2,647 |
| Home Runs Allowed not scored | 43 | 39 |
| Innings Pitched | Leads: 3,172.1 | 2,896.2 |
| ERA | Leads: 2.06 | 2.68 |
| WHIP | Leads: 1.07 | 1.15 |
| K/9 | 3.90 | Leads: 3.93 |
| BB/9 | Leads: 1.91 | 2.14 |
PIV Comparison through 2025
By PIV (Player Impact Value), Mordecai Brown outpaces Jack Chesbro 31,501 to 22,639 — driven by both sides of the ledger: 2,100 PIV per season to 1,887, across 15 seasons to 12. PIV adjusts each season to league baselines, so it's the cleanest way to compare careers across eras.
PIV is computed through the 2025 season. The career totals on this page include 2026 to date, so PIV does not yet reflect the 2026 season.
Peak Seasons
The best single seasons each player produced, ranked by ERA among qualified workloads (120+ innings).
Mordecai Brown — top 3 seasons by ERA (lower is better)
Jack Chesbro — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Mordecai Brown leads in wins, strikeouts, ERA, and WHIP, while Jack Chesbro owns K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Mordecai Brown. PIV agrees: Mordecai Brown grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Mordecai Brown and Jack Chesbro careers compare
From 1903 through 1909, Mordecai Brown and Jack Chesbro were in the majors together. The two careers are close in length, 481 games for Mordecai Brown and 392 for Jack Chesbro across 15 and 12 PIV seasons, so the totals compare on fairly even terms. Where Jack Chesbro comes out ahead, it is in strikeouts per nine (3.93 to 3.90). The per-nine rows read 3.90 strikeouts and 1.91 walks for Mordecai Brown, 3.93 and 2.14 for Jack Chesbro. Their roles differ: Mordecai Brown split time between starting and relief (332 starts in 481 games); Jack Chesbro was mainly a starter (332 starts in 392 games). In WHIP, Mordecai Brown's 1.07 beats Jack Chesbro's 1.15.
Mordecai Brown vs Jack Chesbro: Frequently Asked Questions
- Who was better, Mordecai Brown or Jack Chesbro?
- By the career statistics compared on this page, Mordecai Brown leads Jack Chesbro in 10 of the 12 scored categories.
- Who had the better ERA?
- Mordecai Brown, with 2.06 to Jack Chesbro's 2.68.
- Who won more games?
- Mordecai Brown, with 239 to Jack Chesbro's 198.
- Who recorded more strikeouts?
- Mordecai Brown, with 1,375 to Jack Chesbro's 1,265.
- Who had the better WHIP?
- Mordecai Brown, with 1.07 to Jack Chesbro's 1.15.