Roger Clemens vs George Kirby: Career Stats Comparison
Roger Clemens 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). Roger Clemens played 1984–2007 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
Roger Clemens (1984–2007) and George Kirby (2022–present) — breaking in during the 1980s and the 2020s respectively, so they pitched against very different hitting environments. Roger Clemens finished with 354 wins and 4,672 strikeouts; George Kirby has 54 wins and 769 strikeouts through October 6, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Roger Clemens, with 3.12 to George Kirby's 3.74.
- Who won more games? Roger Clemens, with 354 to George Kirby's 54.
- Who recorded more strikeouts? Roger Clemens, with 4,672 to George Kirby's 769.
- Who had the better WHIP? Neither — both are at 1.17.
- Who pitched more innings? Roger Clemens, with 4,916.2 to George Kirby's 812.1.
- Who threw more shutouts? Roger Clemens, with 46 to George Kirby's 0.
- Who has the higher career Pitcher PIV? Roger Clemens, with 146,187 career Pitcher PIV to George Kirby's 14,778.
Roger Clemens
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 1980s and the 2020s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
George Kirby is still active — his totals below are current through October 6, 2026.
| Statistic | Roger Clemens | George Kirby |
|---|---|---|
| Wins | Leads: 354 | 54 |
| Losses not scored | 184 | 45 |
| Games | Leads: 709 | 142 |
| Games Started | Leads: 707 | 142 |
| Complete Games | Leads: 118 | 2 |
| Shutouts | Leads: 46 | 0 |
| Saves | 0 | 0 |
| Strikeouts | Leads: 4,672 | 769 |
| Walks not scored | 1,580 | 140 |
| Hits Allowed not scored | 4,185 | 813 |
| Home Runs Allowed not scored | 363 | 94 |
| Innings Pitched | Leads: 4,916.2 | 812.1 |
| ERA | Leads: 3.12 | 3.74 |
| WHIP | Leads: 1.17 | 1.17 |
| K/9 | Leads: 8.55 | 8.52 |
| BB/9 | 2.89 | Leads: 1.55 |
PIV Comparison through 2025
By PIV (Player Impact Value), Roger Clemens outpaces George Kirby 146,187 to 14,778 — driven by both sides of the ledger: 6,091 PIV per season to 3,695, across 24 seasons to 4. 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).
Roger Clemens — 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, Roger Clemens leads in wins, strikeouts, ERA, and WHIP, while George Kirby owns no headline categories. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Roger Clemens. PIV agrees: Roger Clemens grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Roger Clemens and George Kirby careers compare
The two careers never overlapped: Roger Clemens's ended in 2007, and George Kirby debuted in 2022. The table compares 709 games of Roger Clemens with 142 of George Kirby across 24 and 4 PIV seasons; totals favor the longer career by default. Where George Kirby comes out ahead, it is in walks per nine (1.55 to 2.89). By rate, Roger Clemens struck out 8.55 and walked 2.89 per nine innings; George Kirby struck out 8.52 and walked 1.55. Both had the same role: Roger Clemens was mainly a starter (707 starts in 709 games); George Kirby was mainly a starter (142 starts in 142 games). George Kirby's numbers are live and update with each game, so the comparison is a snapshot.
Roger Clemens vs George Kirby: Frequently Asked Questions
- Who was better, Roger Clemens or George Kirby?
- By the career statistics compared on this page, Roger Clemens leads George Kirby in 10 of the 12 scored categories.
- Who had the better ERA?
- Roger Clemens, with 3.12 to George Kirby's 3.74.
- Who won more games?
- Roger Clemens, with 354 to George Kirby's 54.
- Who recorded more strikeouts?
- Roger Clemens, with 4,672 to George Kirby's 769.
- Who had the better WHIP?
- Neither — both are at 1.17.