The Seattle Mariners host the Chicago Cubs on August 23, 2026. First pitch from T-Mobile Park is scheduled for 4:10 p.m. EDT. The game will be broadcast on MARQ.
The Cubs are favored by -117 on the moneyline and by -1.5 on the run line. The Mariners are +101 on the moneyline and +1.5 on the run line. The total is set at 7.5 runs.
Find our MLB picks and Cubs vs Mariners prediction below, as well as probable pitchers, weather report, and more.
Cubs vs Mariners Prediction
- Cubs vs Mariners Pick: Under 7.5 (-110, FanDuel)
Our Cubs vs Mariners best bet is the Under. Make sure to find the best odds by checking our live MLB odds page.
Cubs vs Mariners Odds
| Cubs Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +136 | 7.5 -110o / -110u | -112 |
| Mariners Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -164 | 7.5 -110o / -110u | +102 |
- Cubs vs Mariners moneyline: Cubs -117, Mariners +101
- Cubs vs Mariners over/under: 7.5 (-105o / -115u)
- Cubs vs Mariners spread: Cubs -1.5 (+145), Mariners +1.5 (-175)
Cubs vs Mariners Probable Pitchers
| Shota Imanaga (LHP) | Stat | Bryce Miller (RHP) |
|---|---|---|
| 8-9 | W-L | 4-7 |
| 1.4 | fWAR (FanGraphs) | 1.1 |
| 3.77/3.81 | ERA / xERA | 3.71/3.04 |
| 4.53/3.85 | FIP / xFIP | 3.95/3.68 |
| 18.7 | K-BB% | 19.5 |
| 35.4 | GB% | 38.2 |
| .255 | BABIP | .258 |
| 92 | Stuff+ | 107 |
| 110 | Location+ | 111 |
Cubs vs Mariners MLB Betting Preview
Chicago closes out this series finale in Seattle, looking to salvage a split after Saturday's 5-4 loss, with Shota Imanaga on the mound opposite Bryce Miller. The Cubs have been one of the hottest offenses in baseball lately, posting a 116 wRC+ and a .218 ISO over their last 14 days, and they sit second in the majors in scoring at 5.1 runs per game.
Seattle has a middling overall record, but its pitching staff tells a different story. The Mariners have better team ERA, WHIP, FIP, and strikeout-to-walk numbers than Chicago, a quietly elite profile that doesn't show up in the win column the way it does in the underlying metrics.
Cubs vs Mariners Pick, Betting Analysis
This is the kind of matchup the Silent Sharp Unders system is built to find.
Both starters carry ERAs in the same tight, competent range (3.71 and 3.77), and both clubs have real, recent form behind them. Chicago's bats have been scorching, and Seattle's pitching staff has quietly graded out among the league's best by ERA, WHIP, and FIP, even while the win-loss record lags behind.
The public narrative here leans entirely on the Cubs' win streak and offensive firepower, which is exactly the kind of story that pulls attention away from the total itself. Meanwhile, the number has settled at a modest 7.5, a conservative line for a game featuring the majors' No. 2 scoring offense, which is itself a quiet signal that the market sees more resistance in this matchup than the surface-level narrative suggests.
The park adds to the case. T-Mobile Park has a well-earned reputation as one of the more pitcher-friendly environments in the league, and conditions for today's game are stable with nothing in the forecast to inflate scoring.
Add in a Seattle pitching staff that's been better than its record indicates and a total that's landed in a conservative range despite the star power in the lineup across from it, and this profiles as exactly the type of quiet, competent-teams-both-ways spot where the under has found value.
Pick: Under 7.5 (-110, FanDuel)
