Josh Hader vs Kenley Jansen: Career Stats Comparison
Kenley Jansen 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). Josh Hader has played 2017–present as a pitcher; Kenley Jansen has played 2010–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
Josh Hader (2017–present) and Kenley Jansen (2010–present) — both came up during the 2010s, so the matchup is a direct one. Josh Hader has 38 wins and 884 strikeouts through October 6, 2026; Kenley Jansen has 58 wins and 1,329 strikeouts through October 6, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Josh Hader, with 2.50 to Kenley Jansen's 2.60.
- Who won more games? Kenley Jansen, with 58 to Josh Hader's 38.
- Who recorded more strikeouts? Kenley Jansen, with 1,329 to Josh Hader's 884.
- Who had the better WHIP? Josh Hader, with 0.92 to Kenley Jansen's 0.97.
- Who pitched more innings? Kenley Jansen, with 972.1 to Josh Hader's 557.0.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Kenley Jansen, with 34,863 career Pitcher PIV to Josh Hader's 17,542.
Kenley Jansen
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, so read them against the run environment each player worked in, or use the PIV card below, which is adjusted.
Josh Hader and Kenley Jansen are still active — their totals below are current through October 6, 2026.
| Statistic | Josh Hader | Kenley Jansen |
|---|---|---|
| Wins | 38 | Leads: 58 |
| Losses not scored | 33 | 46 |
| Games | 513 | Leads: 983 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 253 | Leads: 498 |
| Strikeouts | 884 | Leads: 1,329 |
| Walks not scored | 213 | 305 |
| Hits Allowed not scored | 301 | 634 |
| Home Runs Allowed not scored | 66 | 95 |
| Innings Pitched | 557.0 | Leads: 972.1 |
| ERA | Leads: 2.50 | 2.60 |
| WHIP | Leads: 0.92 | 0.97 |
| K/9 | Leads: 14.28 | 12.30 |
| BB/9 | 3.44 | Leads: 2.82 |
PIV Comparison through 2025
By PIV (Player Impact Value), Kenley Jansen outpaces Josh Hader 34,863 to 17,542 — driven by both sides of the ledger: 2,179 PIV per season to 1,754, across 16 seasons to 10. 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).
Josh Hader
No seasons meet the qualifying workload, so there is no peak-season list to show.
Kenley Jansen
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Kenley Jansen leads in wins, strikeouts, and innings pitched, while Josh Hader owns ERA, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Kenley Jansen. PIV agrees: Kenley Jansen grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Josh Hader and Kenley Jansen careers compare
The two careers overlap from 2017 on, with both players still active. Playing time explains much of the gap in the counting rows: Josh Hader has appeared in 513 games to Kenley Jansen's 983. The green cells for Josh Hader are ERA (2.50 to 2.60), WHIP (0.92 to 0.97), and strikeouts per nine (14.28 to 12.30). By rate, Josh Hader struck out 14.28 and walked 3.44 per nine innings; Kenley Jansen struck out 12.30 and walked 2.82. Josh Hader worked mostly in relief (0 starts in 513 games, 253 saves), and Kenley Jansen worked mostly in relief (0 starts in 983 games, 498 saves). Because Josh Hader and Kenley Jansen are still playing, the totals above will keep moving through the season.
Josh Hader vs Kenley Jansen: Frequently Asked Questions
- Who was better, Josh Hader or Kenley Jansen?
- By the career statistics compared on this page, Kenley Jansen leads Josh Hader in 6 of the 12 scored categories.
- Who had the better ERA?
- Josh Hader, with 2.50 to Kenley Jansen's 2.60.
- Who won more games?
- Kenley Jansen, with 58 to Josh Hader's 38.
- Who recorded more strikeouts?
- Kenley Jansen, with 1,329 to Josh Hader's 884.
- Who had the better WHIP?
- Josh Hader, with 0.92 to Kenley Jansen's 0.97.