The Pittsburgh Pirates host the Seattle Mariners on June 25, 2026. First pitch from PNC Park is scheduled for 12:35 p.m. ET. The game will be broadcast on SEAM.
The Mariners are favored by -144 on the moneyline and by -1.5 on the run line. The Pirates are +122 on the moneyline and +1.5 on the run line. The total is set at 8.5 runs.
Find my MLB picks and Mariners vs Pirates prediction below, as well as probable pitchers, weather report, and more.
Mariners vs Pirates Prediction
- Mariners vs Pirates Pick: Under 8.5 (-110)
Our Mariners vs Pirates best bet is Under 8.5 total runs this afternoon. Make sure to find the best odds by checking our live MLB odds page.
Mariners vs Pirates Odds
| Mariners Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +118 | 8.5 -110o / -110u | -144 |
| Pirates Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -142 | 8.5 -110o / -110u | +122 |
- Mariners vs Pirates moneyline: Mariners -144, Pirates +122
- Mariners vs Pirates over/under: 8.5 (-110o / -110u)
- Mariners vs Pirates spread: Mariners -1.5 (+118), Pirates +1.5 (-142)
Mariners vs Pirates Probable Pitchers
| Bryce Miller (RHP, SEA) | Stat | Bubba Chandler (RHP, PIT) |
|---|---|---|
| 3-1 | W-L | 2-7 |
| 1.0 | fWAR (FanGraphs) | 0.7 |
| 1.58 / 2.15 | ERA / xERA | 4.62 / 4.18 |
| 2.95 / 2.82 | FIP / xFIP | 4.72 / 5.08 |
| 27.0 | K-BB% | 8.0 |
| 40.7 | GB% | 34.3 |
| .205 | BABIP | .248 |
| 111 | Stuff+ | 105 |
| 111 | Location+ | 102 |
Mariners vs Pirates MLB Betting Preview
The Mariners bats have been extremely quiet for the past 14 days, with the team ranking next-to-last in wRC+ (73) over that span.
PNC Park is traditionally a pitcher-friendly park, especially during day games, where shadows can sometimes impact hitters later in the afternoon. So the ups and downs of Pirates starter Bubba Chandler might not play too heavily on the score.
Seattle will send Bryce Miller to the hill, and he's been electric. His stats are backed up by his expected metrics, and his minuscule 0.70 WHIP pretty much tells the story.
In his past four starts, Miller has allowed just three earned runs and three walks combined across 24 complete innings.
The first game of this series hit the under, and today's featured Bet Labs system recommends going with it again.
Mariners vs Pirates Pick, Betting Analysis
The "Unders with Soft Starters and Neutral Winds" system targets unders in regular-season MLB games where softer home starting pitchers — low strikeout rates and moderate WHIP — are on the mound in games three or four of a series, which is the case of this Mariners-Pirates third and final matchup.
By this point in the series, hitters have seen multiple arms, and scouting reports are sharper, yet scoring remains muted when the matchup lacks overpowering velocity, and winds remain neutral.
The setup avoids exaggerated run environments by filtering out strong directional wind influence, keeping offensive surges in check.
With the home team in the middle of the season grind, winning at a modest clip, the market may overlook how often these quiet conditions lead to slower-paced, low-scoring outcomes.
Pick: Under 8.5 (-110, FanDuel)
