MLB Prop Bets: Washington Nationals vs Seattle Mariners (June 13, 2026)
The Seattle Mariners (37-34) face the Washington Nationals (35-35) at Nationals Park on Saturday at 4:05pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Luis Castillo is the probable pitcher for the Mariners, while Cade Cavalli is the probable pitcher for the Nationals. The total runs line is set at 9.0, with OVER at -101 and UNDER at -119.
- The Mariners (+153) have a 30-41 Run Line record this season, while the Nationals (-186) hold a record of 44-26.
- The Mariners have a 34-33-4 O/U record this season (meaning 34 games have gone over the total runs line, 33 have gone under and four have resulted in a push). The Nationals have a 43-25-2 O/U record.
Scoring Insights
- The Mariners are averaging 4.3 runs per game this season (17th in the league). Comparatively, the Nationals are averaging +1.0 more at 5.3 runs (3rd).
- In the field, the Mariners are allowing only 3.8 runs per game this season (5th in the league), while the Nationals are allowing an average of 5.4 runs (29th).
Let's take a look at how these teams perform in some other key statistical areas.
Batting Insights:
Batting Average
- Looking at their batting averages this season, the Mariners are at .238 (ranking 22nd in the Major leagues), while the Nationals are batting .244 (12th).
Home Runs
- In terms of total home runs this season, the Nationals have hit 91 (7th in the Major Leagues). Meanwhile, the Mariners have managed 93 (T3rd).
Runs Batted In
- Finally, looking at their runs batted in, the Mariners have recorded 299 RBIs to rank T11th in the MLB this season. Comparatively, the Nationals have recorded 354 RBIs to rank 1st.
Pitching Insights:
Earned Run Average
- The Mariners have one of the strongest earned run averages this season, sitting at 3.57 (5th in the Majors), while the Nationals are at the opposite end of the scale with an ERA of 4.74 (26th).
Strikeouts
- Turning our attention to total strikeouts, the Mariners have recorded 610 this season, ranking 9th in the MLB. Meanwhile, the Nationals rank 25th for total strikeouts, recording 541.
Opponent Batting Average
- Opponents are batting an average of .256 against the Nationals this season (26th in the Major Leagues). Comparatively, the Mariners' opponents are at .240 (14th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Mariners | 19-15-37 | 11-9-15 | 8-6-22 | 19-14-31 | 0-1-6 | 0-0-0 | 2-1-7 |
| Nationals | 21-13-36 | 10-7-16 | 11-6-20 | 2-2-3 | 19-11-33 | 0-0-0 | 3-2-5 |
Lead After Three Innings
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Mariners | 33-22-16 | 18-10-7 | 15-12-9 | 28-21-15 | 5-1-1 | 0-0-0 | 4-4-2 |
| Nationals | 27-23-20 | 12-12-9 | 15-11-11 | 4-0-3 | 23-23-17 | 0-0-0 | 5-1-4 |
NRFI/YRFI
The NRFI market is paying -105 and the YRFI is paying -125.
- The NRFI is 33-38 in Mariners games this season. The Nationals have a 36-34 NRFI record.
Last Time They Met
The Mariners recorded a lopsided 10-2 victory against the Nationals at Nationals Park yesterday. Dominic Canzone was unstoppable in that matchup, hitting a home run, a triple and recording 3 RBIs.
