Mariners vs. Rockies Prediction, Odds, Picks - September 23

Bryce Miller and McCade Brown are the projected starters when the Seattle Mariners and the Colorado Rockies square off on Tuesday at T-Mobile Park, at 9:40 p.m. ET. The Rockies are +242 moneyline underdogs for this matchup with the favored Mariners (-304). Seattle (-1.5) is the favorite on the run line. The over/under for the matchup has been listed at 8 runs.

Here's everything you need from a betting perspective on the Mariners-Rockies game, regarding the run line, moneyline and total, plus expert picks.

Keep up with MLB on FOX Sports.

Mariners vs. Astros Highlights | MLB on FOX

Check out the best highlights between the Seattle Mariners and the Houston Astros.

Mariners vs. Rockies Game Information & Odds

• When: Tuesday, September 23, 2025 at 9:40 p.m. ET
• Where: T-Mobile Park in Seattle, Washington
• How to watch on TV: ROOT Sports NW and COLR

Mariners vs. Rockies Prediction

• Score Prediction: Mariners 6, Rockies 4
• Total Prediction: Over 8 runs
• Win Probabilities: Mariners 63%, Rockies 37%

Mariners vs. Rockies Betting Insights

• The Mariners have entered the game as favorites 108 times this season and won 63, or 58.3%, of those games.
• Seattle has not been bigger favorites this season than the -304 moneyline set for this game.
• Bookmakers have implied with the moneyline set for this matchup that the Mariners have a 75.2% chance to win.
• The Rockies have been chosen as underdogs in 151 games this year and have walked away with the win 41 times (27.2%) in those games.
• This year, Colorado has won five of 29 games when listed as at least +242 or worse on the moneyline.
• The Rockies have an implied victory probability of 29.2% according to the moneyline set for this matchup.

Mariners Recent Betting Performance

• The Mariners won all of the seven games they played as a moneyline favorite in their last 10 matchups.
• In their last 10 matchups -- all had a set run total -- the Mariners and their opponents combined to go over the total seven times.
• The Mariners are 7-3-0 against the spread over their past 10 games.

Mariners Recent Stats

Mariners Player Insights

• Cal Raleigh is the Mariners best power hitter, hitting 58 homers this season in addition to accumulating 121 RBI, both team highs.
• Raleigh's home runs put him first in MLB, and he ranks third in RBI.
• Raleigh has collected a hit in two straight games. In his last five games he is batting .222 with two home runs, three walks and three RBIs.
• Julio Rodriguez is hitting .268 with 31 doubles, four triples, 31 home runs and 39 walks.
• Rodriguez is 15th in home runs and 19th in RBI among all hitters in MLB.
• Rodriguez has three games in a row with at least one hit. In his last five games he is hitting .200 with a home run, a walk and an RBI.
• Josh Naylor has accumulated a team-high batting average of .291.
• Naylor will look to build on his eight-game hitting in this game. In his last 10 games he is hitting .341 with two doubles, a home run, three walks and eight RBIs.
• Eugenio Suarez is hitting .231 with 28 doubles, 47 home runs and 46 walks.
• Suarez has recorded at least one hit in three games in a row. During his last five outings he is hitting .444 with three doubles, two home runs, two walks and four RBIs.

Mariners Team Props

Rockies Recent Betting Performance

• In nine games as underdogs over the last 10 matchups, the Rockies have a record of 2-7.
• When it comes to hitting the over, the Rockies and their opponents are 6-4-0 in their last 10 games with a total.
• The Rockies have a record of 4-6-0 ATS over their last 10 games.

Rockies Recent Stats

Rockies Player Insights

• Hunter Goodman leads the Rockies with 30 home runs and 88 runs batted in, while posting a team-best batting average of .279.
• In all of the big leagues, Goodman ranks 21st in home runs and 27th in RBI.
• Mickey Moniak is batting .270 with 18 doubles, eight triples, 24 home runs and 22 walks.
• Moniak is 49th overall in homers and 87th in RBI this season.
• Jordan Beck is batting .266 with 26 doubles, five triples, 15 home runs and 43 walks.
• Tyler Freeman is hitting .281 with 20 doubles, two triples, two home runs and 34 walks.

Rockies Team Props

Angels vs. Rockies Highlights | MLB on FOX

Check out the best highlights between the Los Angeles Angels and the Colorado Rockies.

FOX Sports created this story using technology provided by Data Skrive and data from Sportradar.

Want great stories delivered right to your inbox? Create or log in to your FOX Sports account, follow leagues, teams and players to receive a personalized newsletter daily.

FOLLOW Follow your favorites to personalize your FOX Sports experience

Seattle Mariners

Colorado Rockies