Chicago Cubs vs Seattle Mariners H2H Record

Interleague
Chicago Cubs
Seattle Mariners
Cubs lead Mariners19to12since 2002

Current-feed record from 2002 through 2026.

2026 season series: Mariners lead 2-1

By

Data updated 4 min read

At a glance

Current-feed analysis, 2002 to 2026

Chicago Cubs vs Seattle Mariners insights

Current-feed record
+7wins for Cubs
61% Cubs · 39% Mariners

Mariners have closed the gap since the 2023 schedule change: 6-6.

Recent form
13-7last 20

Cubs won 19-2 on Aug 23, 2026

Where it matters
0Postseason games

No postseason meetings since 2002.

Schedule context
  • Cubs built the series lead before the 2023 schedule change, taking 13 of 19 decided meetings (68%).
  • Since the schedule balanced out they are 6-6, or 50% to Cubs.

Cubs vs Mariners interleague history by season

Chicago Cubs and Seattle Mariners met in 10 seasons inside the current feed. Interleague scheduling makes meeting frequency uneven, so the season table matters more than a raw average.

Active seasons
10
With at least one meeting since 2002
Busiest season
2019
4 meetings
Per active season
3.1
Uneven interleague cadence
Win Percentage
19W
12W
CHC
SEA
61%39%
Chicago CubsSeattle Mariners

Recent Games

Last 10 Games
Aug 23
SEA 2-19 CHC
CHC
Aug 22
SEA 5-4 CHC
SEA
Aug 21
SEA 6-5 CHC
SEA
Jun 22
CHC 6-14 SEA
SEA
Jun 21
CHC 10-7 SEA
CHC
Jun 20
CHC 4-9 SEA
SEA
Apr 14
SEA 2-3 CHC
CHC
Apr 13
SEA 1-4 CHC
CHC
Apr 12
SEA 4-2 CHC
SEA
Apr 12
CHC 2-5 SEA
SEA
Last Meeting
Aug 23, 2026Final
SEA
2
HOME
CHC
19
AWAY
Cubswon by17runs
Snapped Mariners' streak·Game 31 since 2002
Streaks & Momentum
Current Streak
Chicago Cubs won the most recent meeting
1
Avg. Margin of Victory
Games decided by 3.6 runs on average
3.6runs
Momentum (Last 10 vs Archive since 2002)
CHC↓Trending Down
Last 1040%
Archive since 200261.3%
SEA↑Trending Up
Last 1060%
Archive since 200238.7%
Last 10 Results
CHC / SEA

Record since 2002

Season Split & Biggest Wins
Regular season vs Postseason record, plus each team's largest margin of victory
Regular Season31 games
19
12
No postseason meetings appear since 2002.
Chicago Cubs Biggest Win
19–2+17 runs
Aug 23, 2026
Seattle Mariners Biggest Win
14–6+8 runs
Jun 22, 2025
Decade Breakdown
Choose a decade to scope the current-feed page
Season by Season
Season ↓CHC ↕SEA ↕Games ↕
2026123
2025123
2024213
2023213
2019404
2016213
2013213
2010123
2007213
2002213
Home / Away Split
9-5CHC HOME7-10SEA HOME
AWAY
10-7
CHC
AWAY
5-9
SEA

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: 31 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
35.5%

Share of the 31 decided meetings settled by exactly one run.

Won by 2 or more
64.5%

A 2+ run margin crosses 1.5, but this is not a historical line result. Average gap: 3.6.

Average total
9.4runs

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

Home side wins
51.6%

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
7.51714
54.8%
8.5Closest to even1516
48.4%
9.51120
35.5%

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 Cubs
19 W · 61.3%1.63
Seattle Mariners
12 W · 38.7%2.58

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
35%vs 35.5% full archive
-0.5% in the last 20
Won by 2 or more
65%vs 64.5% full archive
+0.5% in the last 20
Average total
11.1 runsvs 9.4 runs full archive
+1.7 runs in the last 20

Seasons 2013 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 Cubs and Mariners in the oddsmatcher.

Questions about this record: Chicago Cubs vs Seattle Mariners

How do recent Chicago Cubs vs Seattle Mariners results compare with the record since 2002?

Seattle Mariners have won 6 of the latest 10 decided meetings. Chicago Cubs lead the decided record 19-12. The recent window is a subset of the current-feed record since 2002, so the page reports the two 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 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

Chicago Cubs and Seattle Mariners have met 31 times in this archive, which covers the 2002 season onward.