MLB Prop Bets: Seattle Mariners vs San Francisco Giants (July 19, 2026)
The San Francisco Giants (42-56) face the Seattle Mariners (49-50) at T-Mobile Park on Sunday at 4:10pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Robbie Ray is the probable pitcher for the Giants, while Logan Gilbert is the probable pitcher for the Mariners. The Mariners are favored to win at -180, while the Giants are at +148. The total runs line is set at 7.5, with OVER at +102 and UNDER at -122.
- The Giants (-149) have a 48-50 Run Line record this season, while the Mariners (+124) hold a record of 41-58.
- The Giants have a 44-44-10 O/U record this season (meaning 44 games have gone over the total runs line, 44 have gone under and 10 have resulted in a push). The Mariners have a 47-45-7 O/U record.
Scoring Insights
- The Giants are averaging 4.1 runs per game this season (25th in the league). Comparatively, the Mariners are averaging 4.0 (28th).
- In the field, the Giants are allowing 4.7 runs per game this season (19th in the league), while the Mariners are allowing an average of 3.9 runs (6th).
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 Giants are at an impressive .256 (ranking 4th in the Major leagues), while the Mariners are batting an underwhelming .227 (29th).
Home Runs
- In terms of total home runs this season, the Mariners have hit 116 (T15th in the Major Leagues). Meanwhile, the Giants have managed 110 (T19th).
Runs Batted In
- Finally, looking at their runs batted in, the Giants have recorded 389 RBIs to rank 24th in the MLB this season. Comparatively, the Mariners have recorded 382 RBIs to rank 27th.
Pitching Insights:
Earned Run Average
- The Mariners have an earned run average of 3.62 this season (7th in the Majors), while The Giants have an ERA of 4.40 (22nd).
Strikeouts
- Turning our attention to total strikeouts, the Giants have recorded 744 this season, ranking 27th in the MLB. Meanwhile, the Mariners rank 10th for total strikeouts, recording 846.
Opponent Batting Average
- Opponents are batting an average of .240 against the Mariners this season (15th in the Major Leagues). Comparatively, the Giants' opponents are at .246 (18th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Giants | 20-25-53 | 10-7-30 | 10-18-23 | 7-6-22 | 13-19-31 | 0-0-0 | 2-3-5 |
| Mariners | 22-20-57 | 13-11-25 | 9-9-32 | 21-17-45 | 1-3-12 | 0-0-0 | 0-0-10 |
Lead After Three Innings
The Giants are +124 to lead after three innings, while the Mariners are -160.
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Giants | 30-42-26 | 13-20-14 | 17-22-12 | 10-14-11 | 20-28-15 | 0-0-0 | 4-5-1 |
| Mariners | 40-35-24 | 22-15-12 | 18-20-12 | 32-29-22 | 8-6-2 | 0-0-0 | 3-6-1 |
NRFI/YRFI
The NRFI market is paying -140 and the YRFI is paying +110.
- The NRFI is 52-46 in Giants games this season. The Mariners have a 52-47 NRFI record.
Last Time They Met
The Mariners recorded a 4-3 extra innings victory over the Giants at T-Mobile Park yesterday. That result snapped the Giants' four-game winning streak against the Mariners. Cole Young was unstoppable in that matchup, hitting a home run, a single and recording 3 RBIs.
