The Seattle Mariners show mixed results as home games. Since 2014, they're 222-222-1 against the spread—a 0.0% win rate with an ROI of -4.5%. While not a strong standalone angle, this data provides valuable context when combined with other factors.

⚖ Neutral
Record222-222-1
Win Rate0.0%
Sample Size445 games
ROI-4.5%
Units Won-20.2u
Time Period2014-2024

Year-by-Year Performance

SeasonRecordWin %ROI
201423-13-00.0%+22.0%
201529-17-00.0%+20.4%
201617-21-00.0%-14.6%
201716-32-00.0%-36.4%
201814-18-00.0%-16.5%
201922-15-00.0%+13.5%
202017-15-00.0%+1.4%
202126-19-10.0%+10.3%
202215-27-00.0%-31.8%
202322-19-00.0%+2.4%
202421-26-00.0%-14.7%

Why This Trend Exists

The Mariners' perfectly neutral home ATS performance reflects the unique dynamics of T-Mobile Park and Seattle's baseball culture. The ballpark's marine layer and consistent weather patterns create predictable offensive conditions that oddsmakers price efficiently, eliminating the typical home field advantages seen in more volatile environments. Seattle's fanbase, while passionate, doesn't generate the intimidating atmosphere found in East Coast markets, resulting in minimal psychological impact on visiting teams. The franchise's long-standing organizational approach emphasizes pitching depth and defensive fundamentals, traits that translate similarly whether playing at home or on the road. This consistency means the Mariners rarely exceed expectations dramatically in either direction at T-Mobile Park. Their recent uptick in form suggests improved roster construction, but the historical pattern indicates regression toward neutral ATS performance is likely. The negative ROI despite the even record points to consistent slight overvaluation by the betting market, particularly during periods when the team shows promise. Bettors should focus on fading Seattle when they're short home favorites following winning streaks, as the market tends to overreact to positive momentum. This trend matters most during summer homestands when casual betting volume peaks and the marine layer creates the most predictable playing conditions.

Frequently Asked Questions

What is the Seattle Mariners's ATS record as home games?

The Seattle Mariners have gone 222-222-1 against the spread (ATS) in home games from 2014-2024. This represents an exactly even record with a 50.0% win rate over 445 total games.

Is betting on the Seattle Mariners as home games profitable?

No, betting on the Seattle Mariners in home games has not been profitable, showing a -4.5% ROI from 2014-2024. Despite the even ATS record, the negative return indicates losses due to vigorish/juice.

How does this compare to the league average?

This performance is slightly below the theoretical break-even point for sports betting. While the 50.0% ATS win rate appears neutral, the -4.5% ROI reflects the typical cost of the betting spread that makes consistent profitability challenging.

ANALYZE This Trend

This trend is near break-even. Combine with other factors and compare odds before placing any bets.

Compare Sportsbook Odds

Methodology

All trends in The Archives are calculated from official game results and closing point spreads from 2014 to 2024. ROI assumes a flat $100 bet at standard -110 juice. Win rate is calculated as wins divided by total decisions (pushes excluded). A minimum of 10 games is required for a trend to be published. Data is sourced from The Odds API and verified against official league records.