Colorado Rockies vs Seattle Mariners Prediction 9/18/26 MLB Picks Today

The Seattle Mariners and the Colorado Rockies meet Friday in MLB action from Coors Field. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Seattle Mariners vs. Colorado Rockies prediction.

Starting Pitching Matchup

The Seattle Mariners will send out Bryan Woo for the start here and Woo is 12-9 with a 3.88 ERA and 163 strikeouts this season. The Colorado Rockies did not have a starting pitcher announced at the time that this article was posted.

Seattle Mariners Recap

The Seattle Mariners come into this game looking to add on to their 7-2 win over the Angels last time out to improve to 71-82 this season. After this series, Seattle will head home for a series against the Astros.

Mariners Snap Three-Game Slide

Luke Raley has 59 hits with 9 doubles, a triple, 15 home runs and 39 RBIs this season. Cole Young’s added 136 hits with 18 doubles, 4 triples, 17 home runs and 65 RBIs and Cal Raleigh has 77 hits with 14 doubles, 22 home runs and 66 RBIs as well this season. Randy Arozarena has 150 hits with 30 doubles, a triple, 25 home runs and 75 RBIs as well on the year. Josh Naylor also has 153 hits with 22 doubles, 10 home runs and 52 RBIs as well on the year. Julio Rodriguez has also added 137 hits with 24 doubles, 21 home runs and 66 RBIs.

Colorado Rockies Recap

The Colorado Rockies come into this game looking to rebound from a 9-2 loss at the hands of the Padres last time out to sit at 56-97 this season. After this series, the Rockies will take on the Arizona Diamondbacks in a series at home.

Rockies Drop Back-To-Back Games

TJ Rumfield has 156 hits with 29 doubles, 3 triples, 15 home runs and 69 RBIs while Ezequiel Tovar has 94 hits with 21 doubles, 11 home runs and 42 RBIs. Hunter Goodman’s added 118 hits with 19 doubles, 2 triples, 38 home runs and 81 RBIs. Troy Johnston has 108 hits with 31 doubles, a triple, 4 home runs and 50 RBIs. Willi Castro also has 111 hits with 20 doubles, a triple, 15 home runs and 56 RBIs. Jake McCarthy also has 151 hits with 30 doubles, 11 triples, 15 home runs and 80 RBIs.

Seattle Mariners @ Colorado Rockies Betting Trends: September 18, 2026

• Probable Starting Pitcher: Gabriel Hughes      Record this season: 0-8      ERA: 6.37
• Home Record: 0-3
• Last 5 against Mariners: –

Why the Colorado Rockies will win

• The Mariners have lost each of their last six games as favorites following a road win.
• The Rockies have won four of their last five games as home underdogs against AL West opponents.
• The Mariners have failed to cover the run line in each of their last nine games against NL opponents following a road win.
• The Rockies have covered the run line in each of their last six night games at Coors Field following a loss.
• The Mariners have trailed after 3 innings in nine of their last 10 road games against NL opponents.
• The Mariners have lost the first inning in each of their last four games against NL West opponents.
• The Mariners have trailed after 5 innings in 13 of their last 14 road games against NL opponents.

• Probable Starting Pitcher: Bryan Woo      Record this season: 12-9      ERA: 3.88
• Road Record: 4-8
• Last 5 against Rockies: –

Why the Seattle Mariners will win

• The Mariners have won each of their last eight night games against the Rockies following a win.
• The Rockies have lost each of their last six games against AL opponents.
• The Rockies have failed to cover the run line in each of their last six games against AL opponents.
• The favorites have covered the run line in nine of the Rockies’ last 11 games.
• The Rockies have trailed after 5 innings in seven of their last eight home games.
• The Rockies have trailed after 3 innings in four of their last five games.

Total Runs Facts

• Each of the Rockies’ last seven home games against AL opponents have gone UNDER the total runs line.
• Eight of the Mariners’ last nine road games have gone OVER the total runs line.
• There has been at least one run scored in the first inning in each of the Mariners’ last six road games against NL opponents.
• There has been at least one run scored in the first inning in each of the Rockies’ last five games.

Colorado Rockies Player Prop Facts

• Mickey Moniak has hit at least one home run in two of his last three home appearances against the Mariners.
• TJ Rumfield has recorded at least one hit in each of his last nine home appearances.
• Gabriel Hughes has recorded four or more strikeouts in four of his last five home appearances.
• TJ Rumfield ranks 3rd amongst qualified players for On Base Percentage (.393) this season.

Seattle Mariners Player Prop Facts

• Cole Young has hit a home run in three of the Mariners’ last four games as favorites against NL West opponents.
• Bryan Woo has recorded five or more strikeouts in each of his last 12 appearances.
• Taylor Ward has recorded at least one hit in each of his last 10 road appearances against NL West opponents.
• Bryan Woo has recorded a win in four of his last five appearances.

Matchup/League Facts

• The Rockies rank T1st in the league for triples this season (36).
• The Rockies rank 30th in the league for ERA this season (5.62).
• The Mariners rank 30th in the league for doubles this season (191).
• The Mariners rank 29th in the league for hits this season (1181).

Seattle Mariners vs. Colorado Rockies Prediction

I’m on the Mariners in this one. I just think the Rockies have given up on the year and while Bryan Woo has had issues on the road this season, he’s been a lot better since the start of August on the road. Coors Field isn’t an easy place to go on the road and pitch, but I think Woo will be good enough here. Give me Seattle.