In this article, we will formulate a Mariners vs Rockies Prediction for this MLB matchup on Sunday, September 20th in the third game of this series. Let’s take a look at the prediction for this MLB matchup.
Colorado Rockies Preview
The Colorado Rockies have a 57-98 record this season and are sitting in the 5th place of the NL West. They have a 32-45 home record and are coming off a 5-3 home win against the Mariners. They will face the Dbacks and the White Sox next.
The Colorado Rockies have a .255 batting average this season, .324 OBP and .417 Slugging percentage. Colorado’s pitching staff has a 5.60 ERA and 1.53 WHIP. TJ Rumfield is the team’s best hitter with a .302 batting average. Jake McCarthy leads the team in RBI with 83, while Hunter Goodman adds a team-high 38 home runs.
Tomoyuki Sugano (R) is the projected starting pitcher for the Rockies, and he has a 12-10 record, 5.49 ERA and 1.36 WHIP.
Seattle Mariners Preview
The Seattle Mariners have a 72-83 record this season and are sitting in the 3rd place of the AL West. They have a 32-48 away record and are coming off a 3-5 road loss against the Rockies. They will face the Astros and the Angels next.
The Seattle Mariners have a .232 batting average this season, .312 OBP and .382 Slugging percentage. Seattle’s pitching staff has a 4.21 ERA and 1.26 WHIP. Randy Arozarena is the team’s best hitter with a .281 batting average, adding a team-high 76 RBI and a team-high 26 home runs.
Kade Anderson (L) is the projected starting pitcher for the Mariners, and he has a 1-2 record, 5.33 ERA and 1.42 WHIP.
Seattle Mariners @ Colorado Rockies Betting Trends: September 20, 2026
- Probable Starting Pitcher: Tomoyuki Sugano Record this season: 12-10 ERA: 5.49
- Home Record: 7-6
- Last 5 against Mariners: 2-0
Why the Colorado Rockies will win
- The Mariners have lost 12 of their last 14 games as road favorites after playing the previous day.
- The Rockies have won six of their last seven games as home underdogs against AL West opponents following a home win.
- The Mariners have failed to cover the run line in each of their last eight games as favorites against NL West opponents following a loss.
- The Rockies have covered the run line in each of their last seven games as home underdogs against AL West opponents.
- The Mariners have trailed after 3 innings in four of their last five day games against NL West opponents.
- The Rockies have led after 5 innings in each of their last five day games at Coors Field against AL West opponents.
- Probable Starting Pitcher: Kade Anderson Record this season: 1-2 ERA: 5.33
- Road Record: 0-1
- Last 5 against Rockies: –
Why the Seattle Mariners will win
- The Rockies have lost eight of their last nine day games after playing the previous day.
- The Mariners have won five of their last six games against the Rockies.
- The Rockies have failed to cover the run line in five of their last six day games against teams that held a losing record.
- The Mariners have covered the run line in four of their last five day games following a road loss.
- The Rockies have lost the first inning in each of their last four games against AL West opponents.
- The Mariners have led after 3 innings in each of their last five road games against NL opponents that held a losing record.
- The Rockies have trailed after 5 innings in each of their last seven games.
Total Runs Facts
- Each of the Rockies’ last nine home games against AL opponents have gone UNDER the total runs line.
- Each of the Mariners’ last four games against NL opponents have gone UNDER the total runs line.
- There has been at least one run scored in the first inning in each of the Mariners’ last eight road games against NL opponents.
- There has been at least one run scored in the first inning in each of the Rockies’ last eight day games against AL West opponents.
Colorado Rockies Player Prop Facts
- Tomoyuki Sugano has recorded a win in each of his last four appearances against AL West opponents.
- Hunter Goodman has hit at least one home run in three of his last six appearances in day games against teams that held a losing record.
- Tomoyuki Sugano has recorded four or more strikeouts in each of his last four appearances against AL West opponents that held a losing record.
- TJ Rumfield has recorded at least one hit in each of his last 11 home appearances.
- TJ Rumfield ranks 3rd amongst qualified players for On Base Percentage (.392) this season.
Seattle Mariners Player Prop Facts
- Cal Raleigh has hit at least one home run in three of the Mariners’ last five games against NL opponents.
- Taylor Ward has recorded at least one hit in each of his last 10 road appearances against NL West opponents.
- Randy Arozarena ranks 10th amongst qualified players for On Base Percentage (.377) this season.
Matchup/League Facts
- The Rockies rank 1st in the league for triples this season (38).
- The Rockies rank 30th in the league for ERA this season (5.60).
- The Mariners rank T29th in the league for doubles this season (197).
- The Mariners rank 29th in the league for batting average this season (.232).
Mariners vs Rockies Prediction
The Mariners are 8-2 in their last 10 meetings against the Rockies and have won two of their last three visits in Colorado.
In this Mariners vs Rockies Prediction, the Mariners are coming as -165 road favorites. The Mariners are almost mathematically eliminated from the playoffs and I don’t trust Kade Anderson and his 5.33 ERA and 1.42 WHIP. Sugano has been better at home and the Rockies have been excellent against lefties lately, scoring 8.2 runs in their last 5 against southpaws and also have a better bullpen ERA in that span. Take the Rockies at home for plus money in this one.