Mariners vs. Pirates prediction: Why Seattle is favored to win Tuesday's MLB matchup [6/23/2026]
Get Seattle Mariners vs Pittsburgh Pirates predictions for MLB Tuesday.

The Pittsburgh Pirates and Seattle Mariners are scheduled to meet in MLB action at PNC Park on Tuesday, starting at 6:40 PM ET.
The Pirates will have Mitch Keller (5-4, 4.92 ERA) as their starting pitcher, while the Mariners have opted for George Kirby (5-7, 4.10 ERA).
Based on updated simulation results, Dimers' proven MLB model gives the Mariners a slight edge with a 54.6% win probability over the Pirates.
This article offers further insights into Tuesday's Mariners vs. Pirates matchup, including best bets and picks.
Mariners vs. Pirates prediction: Who will win and cover?
Our famous predictive model gives the Mariners a 54.6% chance of beating the Pirates.
According to our model, the Pirates (+1.5) have a 57.2% chance of covering the run line, while the over/under total of 8.5 runs has a 54.0% chance of going over,.
Mariners vs. Pirates odds [6/23/2026]
We have sourced the best MLB odds in America for this game, which are listed here:
| Bet Type | Mariners | Pirates |
|---|---|---|
| Run Line | -1.5 (+133) | +1.5 (-154) |
| Moneyline | -126 | +114 |
| Total | o8.5 (-118) | u8.5 (+100) |
All odds are correct at the time of publication and are subject to change.
Mariners vs. Pirates picks and best bet
After matching our predictions against the best current odds, we can reveal our picks for each of the major markets. Plus, find our best bet for the game below:
| Bet Type | Pick | Bet Now |
|---|---|---|
| Run Line | Mariners -1.5 | +133 |
| Moneyline | Mariners | -126 |
| Total | Over 8.5 | -118 |
According to our MLB best bets, the top play to make on this game is Over 8.5 total runs.
These picks are based on our probabilities matched against the implied probabilities from the sportsbook odds.
Mariners vs. Pirates game-day updates and essential details
Tuesday's MLB game between the Pirates and Mariners at PNC Park is scheduled to start at 6:40 PM ET.
- Who: Seattle Mariners vs. Pittsburgh Pirates
- Date: Tuesday, June 23, 2026
- Time: 6:40 PM ET/3:40PM PT
- Venue: PNC Park
Conclusion
We predict the Mariners, with a 54.6% win probability, will likely beat the Pirates in Tuesday's MLB matchup.
Additional tools and information for betting safely can be found in our Responsible Gambling hub.



