Luis Castillo vs George Kirby: Career Stats Comparison
Luis Castillo has the better career line of the two, leading 6 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Luis Castillo has played 2017–present as a pitcher; George Kirby has played 2022–present 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
Luis Castillo (2017–present) and George Kirby (2022–present) — breaking in during the 2010s and the 2020s respectively, so they pitched against very different hitting environments. Luis Castillo has 88 wins and 1,605 strikeouts through October 12, 2026; George Kirby has 54 wins and 769 strikeouts through October 12, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? George Kirby, with 3.74 to Luis Castillo's 3.75.
- Who won more games? Luis Castillo, with 88 to George Kirby's 54.
- Who recorded more strikeouts? Luis Castillo, with 1,605 to George Kirby's 769.
- Who had the better WHIP? George Kirby, with 1.17 to Luis Castillo's 1.20.
- Who pitched more innings? Luis Castillo, with 1,541.1 to George Kirby's 812.1.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Luis Castillo, with 18,581 career Pitcher PIV to George Kirby's 14,778.
Luis Castillo
George Kirby
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 2010s and the 2020s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
Luis Castillo and George Kirby are still active — their totals below are current through October 12, 2026.
| Statistic | Luis Castillo | George Kirby |
|---|---|---|
| Wins | Leads: 88 | 54 |
| Losses not scored | 95 | 45 |
| Games | Leads: 272 | 142 |
| Games Started | Leads: 266 | 142 |
| Complete Games | 1 | Leads: 2 |
| Shutouts | 0 | 0 |
| Saves | 0 | 0 |
| Strikeouts | Leads: 1,605 | 769 |
| Walks not scored | 497 | 140 |
| Hits Allowed not scored | 1,359 | 813 |
| Home Runs Allowed not scored | 199 | 94 |
| Innings Pitched | Leads: 1,541.1 | 812.1 |
| ERA | 3.75 | Leads: 3.74 |
| WHIP | 1.20 | Leads: 1.17 |
| K/9 | Leads: 9.37 | 8.52 |
| BB/9 | 2.90 | Leads: 1.55 |
PIV Comparison through 2025
By PIV (Player Impact Value), Luis Castillo leads George Kirby 18,581 to 14,778 — a longevity gap rather than a per-season one: Luis Castillo played 10 seasons to George Kirby's 4, while George Kirby carries the higher per-season figure (3,695 to 1,858). 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).
Luis Castillo — top 3 seasons by ERA (lower is better)
George Kirby — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Luis Castillo leads in wins, strikeouts, K/9, and innings pitched, while George Kirby owns ERA and WHIP. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Luis Castillo. PIV agrees: Luis Castillo grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Luis Castillo and George Kirby careers compare
The two careers overlap from 2022 on, with both players still active. Playing time explains much of the gap in the counting rows: Luis Castillo has appeared in 272 games to George Kirby's 142. The green cells for George Kirby are complete games (2 to 1), ERA (3.74 to 3.75), and WHIP (1.17 to 1.20). By rate, Luis Castillo struck out 9.37 and walked 2.90 per nine innings; George Kirby struck out 8.52 and walked 1.55. Luis Castillo was mainly a starter (266 starts in 272 games), and George Kirby was mainly a starter (142 starts in 142 games). In WHIP, George Kirby's 1.17 beats Luis Castillo's 1.20. Luis Castillo and George Kirby's numbers are live and update with each game, so the comparison is a snapshot.
Luis Castillo vs George Kirby: Frequently Asked Questions
- Who was better, Luis Castillo or George Kirby?
- By the career statistics compared on this page, Luis Castillo leads George Kirby in 6 of the 12 scored categories.
- Who had the better ERA?
- George Kirby, with 3.74 to Luis Castillo's 3.75.
- Who won more games?
- Luis Castillo, with 88 to George Kirby's 54.
- Who recorded more strikeouts?
- Luis Castillo, with 1,605 to George Kirby's 769.
- Who had the better WHIP?
- George Kirby, with 1.17 to Luis Castillo's 1.20.