The Colorado Rockies host the Seattle Mariners on September 18, 2026. First pitch from Coors Field is scheduled for 8:10 p.m. EDT. The game will be broadcast on SEAM.
The Mariners are favored by -189 on the moneyline and by -1.5 on the run line. The Rockies are +154 on the moneyline and +1.5 on the run line. The total is set at 10.5 runs.
Find my MLB picks and Mariners vs Rockies prediction below. For more MLB betting tools, including probable pitchers, weather reports, and more, download the Action Network app today.
Mariners vs Rockies Prediction
- Mariners vs Rockies Pick: Bryan Woo Under 17.5 Outs Recorded (+105)
My Mariners vs Rockies best bet is Bryan Woo to stay under his outs recorded prop of 17.5. Make sure to find the best odds by checking our live MLB odds page.
Mariners vs Rockies Odds
| Mariners Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +103 | 10.5 -110o / -110u | -189 |
| Rockies Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -123 | 10.5 -110o / -110u | +154 |
- Mariners vs Rockies moneyline: Mariners -189, Rockies +154
- Mariners vs Rockies over/under: 10.5 (-110o / -110u)
- Mariners vs Rockies spread: Mariners -1.5 (-123), Rockies +1.5 (+103)
Mariners vs Rockies Probable Pitchers
Mariners vs Rockies Pick, Betting Analysis
By Derek Carty
You may find this surprising considering the Seattle Mariners are facing the Colorado Rockies, but there may be some value on Bryan Woo's pitching outs recorded prop.
Remember, Coors Field in Colorado leads the MLB in Park Factor once again in 2026, making it a hitter's haven.
THE BAT X is projecting the Mariners starting pitcher to record 16.34 pitching outs while oddsmakers are implying 17.65. The model believes there's a 57% chance he records fewer than 18 pitching outs. If you can get the under at +125 or better, there's great value here. This play is good down to at least -107.
Pick: Bryan Woo Under 17.5 Outs Recorded (+105, Bet to -107)
