Aroldis Chapman vs Gregg Olson: Career Stats Comparison
Aroldis Chapman 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). Aroldis Chapman has played 2010–present as a pitcher; Gregg Olson played 1988–2001 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
Aroldis Chapman (2010–present) and Gregg Olson (1988–2001) — breaking in during the 2010s and the 1980s respectively, so they pitched against very different hitting environments. Aroldis Chapman has 63 wins and 1,402 strikeouts through October 12, 2026; Gregg Olson finished with 40 wins and 588 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Aroldis Chapman, with 2.48 to Gregg Olson's 3.46.
- Who won more games? Aroldis Chapman, with 63 to Gregg Olson's 40.
- Who recorded more strikeouts? Aroldis Chapman, with 1,402 to Gregg Olson's 588.
- Who had the better WHIP? Aroldis Chapman, with 1.08 to Gregg Olson's 1.38.
- Who pitched more innings? Aroldis Chapman, with 873.0 to Gregg Olson's 672.0.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Aroldis Chapman, with 36,308 career Pitcher PIV to Gregg Olson's 10,029.
Aroldis Chapman
Gregg Olson
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 1980s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
Aroldis Chapman is still active — his totals below are current through October 12, 2026.
| Statistic | Aroldis Chapman | Gregg Olson |
|---|---|---|
| Wins | Leads: 63 | 40 |
| Losses not scored | 52 | 39 |
| Games | Leads: 916 | 622 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | Leads: 402 | 217 |
| Strikeouts | Leads: 1,402 | 588 |
| Walks not scored | 431 | 330 |
| Hits Allowed not scored | 510 | 598 |
| Home Runs Allowed not scored | 57 | 46 |
| Innings Pitched | Leads: 873.0 | 672.0 |
| ERA | Leads: 2.48 | 3.46 |
| WHIP | Leads: 1.08 | 1.38 |
| K/9 | Leads: 14.45 | 7.88 |
| BB/9 | 4.44 | Leads: 4.42 |
PIV Comparison through 2025
By PIV (Player Impact Value), Aroldis Chapman outpaces Gregg Olson 36,308 to 10,029 — driven by both sides of the ledger: 2,017 PIV per season to 590, across 18 seasons to 17. 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).
Aroldis Chapman
No seasons meet the qualifying workload, so there is no peak-season list to show.
Gregg Olson
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Aroldis Chapman leads in wins, strikeouts, ERA, and WHIP, while Gregg Olson owns no headline categories. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Aroldis Chapman. PIV agrees: Aroldis Chapman grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Aroldis Chapman and Gregg Olson careers compare
No season is shared: Gregg Olson played 1988–2001, Aroldis Chapman 2010–present. The two careers are close in length, 916 games for Aroldis Chapman and 622 for Gregg Olson across 18 and 17 PIV seasons, so the totals compare on fairly even terms. Gregg Olson's edges on the table are walks per nine (4.42 to 4.44). The per-nine rows read 14.45 strikeouts and 4.44 walks for Aroldis Chapman, 7.88 and 4.42 for Gregg Olson. Both had the same role: Aroldis Chapman worked mostly in relief (0 starts in 916 games, 402 saves); Gregg Olson worked mostly in relief (0 starts in 622 games, 217 saves). In WHIP, Aroldis Chapman's 1.08 beats Gregg Olson's 1.38. Aroldis Chapman's numbers are live and update with each game, so the comparison is a snapshot.
Aroldis Chapman vs Gregg Olson: Frequently Asked Questions
- Who was better, Aroldis Chapman or Gregg Olson?
- By the career statistics compared on this page, Aroldis Chapman leads Gregg Olson in 8 of the 12 scored categories.
- Who had the better ERA?
- Aroldis Chapman, with 2.48 to Gregg Olson's 3.46.
- Who won more games?
- Aroldis Chapman, with 63 to Gregg Olson's 40.
- Who recorded more strikeouts?
- Aroldis Chapman, with 1,402 to Gregg Olson's 588.
- Who had the better WHIP?
- Aroldis Chapman, with 1.08 to Gregg Olson's 1.38.