Seattle Mariners at Colorado Rockies: Betting Trends, Sep 18, 2026 (MLB)
The Seattle Mariners visit the Colorado Rockies on September 18, 2026. This season the Seattle Mariners have covered the spread in 58 of 153 games (37.9%), and the Colorado Rockies have covered the spread in 78 of 153 games (51%) (2026). Every figure on this page is a count of settled games or a line a book posted. DataStreak does not produce picks. Updated September 18, 2026.
Probable starters: SEA Bryan Woo, COL Gabriel Hughes.
The posted line
At unibet as of September 18, 2026: COL +1.5, total 10.5. A line is the number a book posted at that moment, shown as a fact about the market; it is not a forecast and it moves.
Against the spread, 2026 season
Covers of settled games. A cover is a settled game where the final margin beat the closing spread; pushes are left out of the rate.
| Team | Overall | Home | Road | Last 10 |
|---|---|---|---|---|
| Seattle Mariners | 58 of 153 (37.9%) | 28 of 75 (37.3%) | 30 of 78 (38.5%) | 4 of 10 (40%) |
| Colorado Rockies | 78 of 153 (51%) | 38 of 75 (50.7%) | 40 of 78 (51.3%) | 2 of 10 (20%) |
Previous meetings
Finished regular-season games between the two, this season and last, newest first.
| Date | Away | Home |
|---|---|---|
| 2025-09-25 | COL 2 | SEA 6 |
| 2025-09-24 | COL 2 | SEA 9 |
| 2025-09-23 | COL 3 | SEA 4 |
Seattle Mariners: last 5 games
| Date | Opp | Result |
|---|---|---|
| 2026-09-17 | @ LAA | W 7-2 |
| 2026-09-16 | @ LAA | L 1-2 |
| 2026-09-15 | @ LAA | L 4-6 |
| 2026-09-13 | @ OAK | L 7-8 |
| 2026-09-13 | @ OAK | W 19-1 |
Colorado Rockies: last 5 games
| Date | Opp | Result |
|---|---|---|
| 2026-09-17 | vs SD | L 2-9 |
| 2026-09-17 | vs SD | L 3-9 |
| 2026-09-16 | vs SD | W 9-3 |
| 2026-09-15 | vs SD | L 7-8 |
| 2026-09-13 | @ DET | L 1-8 |
Over each player's last 20 games, the highest clear rate at the lowest posted rung of each market. Counts of games, not projections; each name opens the player's own page.
SEA players clearing their prop lines most often
| Player | Market | Line | Cleared | Rate |
|---|---|---|---|---|
| Logan Gilbert | Pitcher Strikeouts | 3+ strikeouts | 20 of 20 | 100% |
| Bryan Woo | Pitcher Strikeouts | 3+ strikeouts | 20 of 20 | 100% |
| Bryce Miller | Pitcher Strikeouts | 3+ strikeouts | 19 of 20 | 95% |
COL players clearing their prop lines most often
| Player | Market | Line | Cleared | Rate |
|---|---|---|---|---|
| TJ Rumfield | Hits | 1+ hits | 17 of 20 | 85% |
| TJ Rumfield | Total Bases | 1+ total bases | 17 of 20 | 85% |
| Jake McCarthy | Hits | 1+ hits | 16 of 20 | 80% |
Questions about Seattle Mariners at Colorado Rockies
Who has the better record against the spread, the Seattle Mariners or the Colorado Rockies?
The Seattle Mariners have covered in 58 of 153 games (37.9%) and the Colorado Rockies in 78 of 153 (51%) in the 2026 season, so the Colorado Rockies have the higher rate. A cover is a settled game where the final margin beat the closing spread; a rate is a count of past games, not a prediction of this one.
How have the last meetings between the Seattle Mariners and the Colorado Rockies gone?
Of the last 3 regular-season meetings this season and last, the Colorado Rockies won 0 and the Seattle Mariners won 3. The most recent was COL 2, SEA 6 on September 25, 2025.
Which players in Seattle Mariners at Colorado Rockies clear their prop lines most often?
Logan Gilbert has cleared 3+ strikeouts in 20 of his last 20 games (100%); Bryan Woo has cleared 3+ strikeouts in 20 of his last 20 games (100%), over each player's last 20 games at the lowest posted rung. Counts of games, not projections.
Are these SEA at COL numbers picks?
No. Every figure is a count of settled games or a line a book posted, shown with the games it comes from so the arithmetic is checkable. DataStreak does not produce picks. Updated September 18, 2026.
How these numbers are measured
A cover is a settled game where the final margin beat the closing spread; a push is a margin that landed on it. Previous meetings are finished regular-season games between the two teams. The prop rates count the games in which a player's stat reached the line over that player's last 20 games. A posted line is one book's number on one day. Nothing here is a projection.
Both teams' full pages: Seattle Mariners and Colorado Rockies. The live board with every team and tonight's lines is the MLB ATS Radar. Every MLB player at a glance: MLB player prop hit rates, or read how the boards are built.