Kenley Jansen vs Devin Williams: Career Stats Comparison
Kenley Jansen has the better career line of the two, leading 8 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Kenley Jansen has played 2010–present as a pitcher; Devin Williams has played 2019–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
Kenley Jansen (2010–present) and Devin Williams (2019–present) — both came up during the 2010s, so the matchup is a direct one. Kenley Jansen has 58 wins and 1,329 strikeouts through October 12, 2026; Devin Williams has 34 wins and 517 strikeouts through October 12, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Kenley Jansen, with 2.60 to Devin Williams's 2.69.
- Who won more games? Kenley Jansen, with 58 to Devin Williams's 34.
- Who recorded more strikeouts? Kenley Jansen, with 1,329 to Devin Williams's 517.
- Who had the better WHIP? Kenley Jansen, with 0.97 to Devin Williams's 1.11.
- Who pitched more innings? Kenley Jansen, with 972.1 to Devin Williams's 338.1.
- 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 Devin Williams's 13,215.
Kenley Jansen
Devin Williams
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.
Kenley Jansen and Devin Williams are still active — their totals below are current through October 12, 2026.
| Statistic | Kenley Jansen | Devin Williams |
|---|---|---|
| Wins | Leads: 58 | 34 |
| Losses not scored | 46 | 18 |
| Games | Leads: 983 | 352 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | Leads: 498 | 102 |
| Strikeouts | Leads: 1,329 | 517 |
| Walks not scored | 305 | 158 |
| Hits Allowed not scored | 634 | 217 |
| Home Runs Allowed not scored | 95 | 23 |
| Innings Pitched | Leads: 972.1 | 338.1 |
| ERA | Leads: 2.60 | 2.69 |
| WHIP | Leads: 0.97 | 1.11 |
| K/9 | 12.30 | Leads: 13.75 |
| BB/9 | Leads: 2.82 | 4.20 |
PIV Comparison through 2025
By PIV (Player Impact Value), Kenley Jansen outpaces Devin Williams 34,863 to 13,215 — driven by both sides of the ledger: 2,179 PIV per season to 1,888, across 16 seasons to 7. 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).
Kenley Jansen
No seasons meet the qualifying workload, so there is no peak-season list to show.
Devin Williams
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, ERA, and WHIP, while Devin Williams owns 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 Kenley Jansen and Devin Williams careers compare
Kenley Jansen and Devin Williams are both active, and their careers have run side by side since 2019. Playing time explains much of the gap in the counting rows: Kenley Jansen has appeared in 983 games to Devin Williams's 352. Where Devin Williams comes out ahead, it is in strikeouts per nine (13.75 to 12.30). The per-nine rows read 12.30 strikeouts and 2.82 walks for Kenley Jansen, 13.75 and 4.20 for Devin Williams. Both had the same role: Kenley Jansen worked mostly in relief (0 starts in 983 games, 498 saves); Devin Williams worked mostly in relief (0 starts in 352 games, 102 saves). Because Kenley Jansen and Devin Williams are still playing, the totals above will keep moving through the season.
Kenley Jansen vs Devin Williams: Frequently Asked Questions
- Who was better, Kenley Jansen or Devin Williams?
- By the career statistics compared on this page, Kenley Jansen leads Devin Williams in 8 of the 12 scored categories.
- Who had the better ERA?
- Kenley Jansen, with 2.60 to Devin Williams's 2.69.
- Who won more games?
- Kenley Jansen, with 58 to Devin Williams's 34.
- Who recorded more strikeouts?
- Kenley Jansen, with 1,329 to Devin Williams's 517.
- Who had the better WHIP?
- Kenley Jansen, with 0.97 to Devin Williams's 1.11.