Chicago White Sox vs Seattle Mariners All-Time Record

American League
Chicago White Sox
Seattle Mariners
White Sox lead Mariners255to235since 1977

Retrosheet history through 2025, plus 6 final games from the current feed.

2026 season series tied 3-3

By

Data updated 6 min read

At a glance

All-time since 1977 · current-feed analysis, 2002 to 2026

Chicago White Sox vs Seattle Mariners insights

Current-feed record
+9wins for White Sox
53% White Sox · 47% Mariners

Mariners have closed the gap since the 2023 schedule change: 18-7.

Recent form
6-14last 20

Mariners won 5-4 on May 20, 2026

Where it matters
0Postseason games

No postseason meetings since 2002.

Schedule context
  • White Sox built the series lead before the 2023 schedule change, taking 87 of 154 decided meetings (56%).
  • Since the schedule balanced out they are 7-18, or 28% to White Sox.

White Sox vs Mariners postseason head-to-head record

Chicago White Sox and Seattle Mariners have met 490 times since 1977, 3 times in the postseason. The playoff games are included in the all-time total, not added on top of it.

Postseason record
Mariners 3-0
3 postseason games since 1977
Playoff share
0.6%
Share of all meetings
Regular season
487
Recorded non-postseason meetings
Win Percentage
94W
85W
CHW
SEA
53%47%
Chicago White SoxSeattle Mariners

Recent Games

Last 10 Games
May 20
SEA 5-4 CHW
SEA
May 19
SEA 1-2 CHW
CHW
May 18
SEA 6-1 CHW
SEA
May 10
CHW 2-1 SEA
CHW
May 9
CHW 6-1 SEA
CHW
May 8
CHW 8-12 SEA
SEA
Aug 7
SEA 4-3 CHW
SEA
Aug 6
SEA 8-6 CHW
SEA
Aug 5
SEA 8-3 CHW
SEA
May 21
CHW 5-6 SEA
SEA
Last Meeting
May 20, 2026Final
SEA
5
HOME
CHW
4
AWAY
Marinerswon by1run
Snapped White Sox' streak·Game 179 since 2002
Streaks & Momentum
Current Streak
Seattle Mariners won the most recent meeting
1
Avg. Margin of Victory
Games decided by 3.3 runs on average
3.3runs
Momentum (Last 10 vs Archive since 2002)
CHW↓Trending Down
Last 1030%
Archive since 200252.5%
SEA↑Trending Up
Last 1070%
Archive since 200247.5%
Last 10 Results
CHW / SEA

Record since 2002

Season Split & Biggest Wins
Regular season vs Postseason record, plus each team's largest margin of victory
Regular Season179 games
94
85
No postseason meetings appear since 2002.
Chicago White Sox Biggest Win
16–1+15 runs
May 20, 2017
Seattle Mariners Biggest Win
14–2+12 runs
Aug 21, 2023
Decade Breakdown
Choose a decade to scope the current-feed page
Season by Season
Season ↓CHW ↕SEA ↕Games ↕
2026336
2025156
2024167
2023246
2022426
2021336
2019246
2018246
2017347
2016437
2015437
2014347
2013336
2012819
2011729
20109110
2009459
2008516
2007178
2006549
2005639
2004729
2003279
2002549

All 24 seasons are shown in the table above.

Home / Away Split
56-37CHW HOME48-38SEA HOME
AWAY
38-48
CHW
AWAY
37-56
SEA
Retrosheet archiveComplete through 2025

Chicago White Sox vs Seattle Mariners all-time record, 1977 to 2025

Explore how this matchup changed by decade, where each lineup produced its runs, and the games that pushed the rivalry record book. This archive is a separate source window from the current-feed sections above, which start in 2002.

Games
484
Peak inning
4
Record game
29 runs
Two source windows. Current-feed sections: 179 games from 2002 to 2026. History Lab: 484 Retrosheet games from 1977 to 2025. The first refreshes with current finals; Retrosheet's published archive currently ends in 2025.

Decade balance

Select an era to inspect pace, scoring and attendance.

The information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at www.retrosheet.org.

Open source archive

Betting Context

Betting context since 2002

How this pairing has settled: run margins, totals and break-even prices derived from its historical record. These are final-score frequencies, not results against a closing line. We do not hold historical sportsbook prices for these games.

One-run games
34.6%

Share of the 179 decided meetings settled by exactly one run.

Won by 2 or more
65.4%

A 2+ run margin crosses 1.5, but this is not a historical line result. Average gap: 3.3.

Average total
9runs

Final-score average without accounting for park, bullpen or weather.

Home side wins
58.1%

Share of decided meetings won by the listed home team.

Totals ladder

Where the combined score landed against the half-run lines a book normally posts. Half runs cannot push, so every meeting falls on one side.

LineOverUnderOver rate
7.59980
55.3%
8.5Closest to even9485
52.5%
9.575104
41.9%

Fair price from the base rate

The decimal price that corresponds exactly to each club's win share in this archive. It describes the record and does not estimate the next game.

Chicago White Sox
94 W · 52.5%1.90
Seattle Mariners
85 W · 47.5%2.11

A base rate is not a forecast. Starting pitchers, lineups, injuries and venue all matter more to a single game than a multi-season head-to-head record.

Last 20 meetings vs full history

One-run games
50%vs 34.6% full archive
+15.4% in the last 20
Won by 2 or more
50%vs 65.4% full archive
-15.4% in the last 20
Average total
8.2 runsvs 9 runs full archive
-0.8 runs in the last 20

Seasons 2023 to 2026. The comparison shows whether the last 20 final scores differ from the longer archive, without assigning a cause or predicting what comes next.

View the break-even percentages in another odds format with the odds converter, or compare current prices for White Sox and Mariners in the oddsmatcher.

Questions about this record: Chicago White Sox vs Seattle Mariners

What is the Chicago White Sox vs Seattle Mariners postseason record?

The postseason subset contains 3 games: Chicago White Sox have 0 wins and Seattle Mariners have 3 wins. Those games are already included in the complete series from 1977 through 2026.

How do recent Chicago White Sox vs Seattle Mariners results compare with the complete record?

Seattle Mariners have won 7 of the latest 10 decided meetings. Chicago White Sox lead the decided record 255-235. The recent window is a subset of the complete series from 1977 through 2026, so the page reports the two separately.

When did the Chicago White Sox and Seattle Mariners first play each other?

The Retrosheet archive's first recorded meeting for this pairing is Jun 27, 1977, when Chicago White Sox beat Seattle Mariners 10-4 at home. The archive covers 484 meetings from 1977 through 2025. The current feed starts in 2002 and is reported separately.

About Erik Andersson

Erik Andersson is SharkBetting's Content & Marketing Specialist. His published work focuses on betting methodology, market analysis, regulation and consumer education.

The source windows, derivations and update process for this data page are documented in the methodology above.

View full profile →

Methodology & Data Sources

Current MLB game logs come from the balldontlie API and cover the 2002 season onward. Scores and schedule anomalies are checked against the official MLB Stats API. Spring training is excluded, while results from earlier franchise identities are merged into the current club.

The all-time record and the History Lab use Retrosheet game logs through 2025, with inning lines, team totals, attendance, duration and ballpark fields when available. Final games after 2025 come from the current feed, and every section built on that feed alone is labeled as starting in 2002.

The betting context summarizes completed final scores only. It contains no sportsbook closing lines and summarizes only completed games. Report a possible error through our contact page with the matchup and game date.

Read the full H2H data methodology →

Last updated Sources: balldontlie, MLB Stats API, Retrosheet

Chicago White Sox and Seattle Mariners have met 179 times in this archive, which covers the 2002 season onward.