Seattle Mariners vs San Francisco Giants All-Time Record

Interleague
Seattle Mariners
San Francisco Giants
Series tied 26-26 since 1997

Retrosheet history through 2025, plus 3 final games from the current feed.

2026 season series: Mariners lead 2-1

By

Data updated 5 min read

At a glance

All-time since 1997 · current-feed analysis, 2002 to 2026

Seattle Mariners vs San Francisco Giants insights

Current-feed record
+2wins for Mariners
53% Mariners · 47% Giants

The split has held steady across the schedule change: 6-6 since 2023.

Recent form
9-11last 20
Mariners on a 2-game streak

Mariners won 6-3 on Jul 19, 2026

Where it matters
0Postseason games

No postseason meetings since 2002.

Schedule context
  • Mariners built the series lead before the 2023 schedule change, taking 13 of 24 decided meetings (54%).
  • Since the schedule balanced out they are 6-6, or 50% to Mariners.

Mariners vs Giants complete all-time series record

Seattle Mariners and San Francisco Giants have met 52 times since 1997, never in the postseason. 16 meetings predate the current feed, which adds game-level detail from 2002.

History span
1997 to 2026
First and latest meeting
Before 2002
16
Meetings from the Retrosheet game logs
Since 2002
36
Meetings with game-level detail below
Win Percentage
19W
17W
SEA
SF
53%47%
Seattle MarinersSan Francisco Giants

Recent Games

Last 10 Games
Jul 19
SEA 6-3 SF
SEA
Jul 18
SEA 4-3 SF
SEA
Jul 17
SEA 0-7 SF
SF
Apr 6
SF 5-4 SEA
SF
Apr 5
SF 4-1 SEA
SF
Apr 4
SF 10-9 SEA
SF
Aug 25
SEA 4-3 SF
SEA
Aug 24
SEA 3-4 SF
SF
Aug 23
SEA 6-5 SF
SEA
Jul 5
SF 2-0 SEA
SF
Last Meeting
Jul 19, 2026Final
SEA
6
HOME
SF
3
AWAY
Marinerswon by3runs
Mariners' 2nd straight in this series·Game 36 since 2002
Streaks & Momentum
Current Streak
Seattle Mariners: 2 consecutive wins
2
Avg. Margin of Victory
Games decided by 3.0 runs on average
3.0runs
Momentum (Last 10 vs Archive since 2002)
SEA↓Trending Down
Last 1040%
Archive since 200252.8%
SF↑Trending Up
Last 1060%
Archive since 200247.2%
Last 10 Results
SEA / SF

Record since 2002

Season Split & Biggest Wins
Regular season vs Postseason record, plus each team's largest margin of victory
Regular Season36 games
19
17
No postseason meetings appear since 2002.
Seattle Mariners Biggest Win
8–1+7 runs
Jun 17, 2006
San Francisco Giants Biggest Win
10–1+9 runs
Apr 4, 2018
Decade Breakdown
Choose a decade to scope the current-feed page
Season by Season
Season ↓SEA ↕SF ↕Games ↕
2026213
2025033
2024213
2023213
2021213
2020044
2018224
2015224
2012213
2009213
2006303

All 11 seasons are shown in the table above.

Home / Away Split
15-9SEA HOME8-4SF HOME
AWAY
4-8
SEA
AWAY
9-15
SF
Retrosheet archiveComplete through 2025

Seattle Mariners vs San Francisco Giants all-time record, 1997 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
49
Peak inning
4
Record game
26 runs
Two source windows. Current-feed sections: 36 games from 2006 to 2026. History Lab: 49 Retrosheet games from 1997 to 2025. The first refreshes with current finals; Retrosheet's published archive currently ends in 2025.Small historical sample: 49 games. Era and inning rates describe these meetings, but should not be treated as a forecast.

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.

Small sample: 36 decided meetings, under the 50 we treat as the floor for a stable rate. Read the figures below as description, not a forecast. Interleague pairs meet in short bursts, so a single series can move any percentage here by several points.

One-run games
41.7%

Share of the 36 decided meetings settled by exactly one run.

Won by 2 or more
58.3%

A 2+ run margin crosses 1.5, but this is not a historical line result. Average gap: 3.

Average total
8.1runs

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

Home side wins
63.9%

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
7.5Closest to even1818
50%
8.51719
47.2%
9.51125
30.6%

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.

Seattle Mariners
19 W · 52.8%1.89
San Francisco Giants
17 W · 47.2%2.12

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 41.7% full archive
+8.3% in the last 20
Won by 2 or more
50%vs 58.3% full archive
-8.3% in the last 20
Average total
8.9 runsvs 8.1 runs full archive
+0.8 runs in the last 20

Seasons 2018 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 Mariners and Giants in the oddsmatcher.

Questions about this record: Seattle Mariners vs San Francisco Giants

How do recent Seattle Mariners vs San Francisco Giants results compare with the complete record?

San Francisco Giants have won 6 of the latest 10 decided meetings. The complete decided record is tied 26-26. The recent window is a subset of the complete series from 1997 through 2026, so the page reports the two separately.

When did the Seattle Mariners and San Francisco Giants first play each other?

The Retrosheet archive's first recorded meeting for this pairing is Jun 17, 1997, when San Francisco Giants beat Seattle Mariners 4-3 at home. The archive covers 49 meetings from 1997 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

Seattle Mariners and San Francisco Giants have met 36 times in this archive, which covers the 2006 season onward.