MLB Prop Bets: Seattle Mariners vs Chicago White Sox (May 18, 2026)
The Chicago White Sox (24-22) face the Seattle Mariners (22-26) at T-Mobile Park on Monday at 9:40pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Noah Schultz is the probable pitcher for the White Sox, while Bryan Woo is the probable pitcher for the Mariners. The Mariners are favored to win at -180, while the White Sox are at +148. The total runs line is set at 7.0, with OVER at -112 and UNDER at -107.
- The White Sox (-157) have a 25-21 Run Line record this season, while the Mariners (+130) hold a record of 19-29.
- The White Sox have a 27-19-0 O/U record this season (meaning 27 games have gone over the total runs line and 19 have gone under). The Mariners have a 22-25-1 O/U record.
Scoring Insights
- The White Sox are averaging 4.6 runs per game this season (10th in the league). Comparatively, the Mariners are averaging only 4.1 (22nd).
- In the field, the White Sox are allowing 4.7 runs per game this season (22nd in the league), while the Mariners are allowing an average of 4.0 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 White Sox are at .236 (ranking 18th in the Major leagues), while the Mariners are batting .228 (25th).
Home Runs
- In terms of total home runs this season, the Mariners have hit 54 (10th in the Major Leagues). Meanwhile, the White Sox have managed 66 (T2nd).
Runs Batted In
- Finally, looking at their runs batted in, the White Sox have recorded 201 RBIs to rank 12th in the MLB this season. Comparatively, the Mariners have recorded 193 RBIs to rank T17th.
Pitching Insights:
Earned Run Average
- The Mariners have an earned run average of 3.75 this season (7th in the Majors), while The White Sox have an ERA of 4.35 (23rd).
Strikeouts
- Turning our attention to total strikeouts, the White Sox have recorded 366 this season, ranking T22nd in the MLB. Meanwhile, the Mariners rank 11th for total strikeouts, recording 407.
Opponent Batting Average
- Opponents are batting an average of .252 against the Mariners this season (23rd in the Major Leagues). Comparatively, the White Sox's opponents are at .242 (17th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| White Sox | 14-10-22 | 7-6-11 | 7-4-11 | 0-1-5 | 14-9-17 | 0-0-0 | 4-4-2 |
| Mariners | 12-13-23 | 8-9-9 | 4-4-14 | 12-12-19 | 0-1-4 | 0-0-0 | 3-3-4 |
Lead After Three Innings
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| White Sox | 21-14-11 | 11-7-6 | 10-7-5 | 0-3-3 | 21-11-8 | 0-0-0 | 4-4-2 |
| Mariners | 19-17-12 | 11-10-5 | 8-7-7 | 16-16-11 | 3-1-1 | 0-0-0 | 4-3-3 |
NRFI/YRFI
The NRFI market is paying -160 and the YRFI is paying +120.
- The NRFI is 21-25 in White Sox games this season. The Mariners have a 20-28 NRFI record.
Last Time They Met
The White Sox recorded a 2-1 victory over the Mariners at Rate Field when these teams last met on May 10. Randal Grichuk went yard en route to that victory, hitting a home run to go with an RBI.
