Seattle Mariners vs Colorado Rockies Picks and Predictions September 23rd 2025

The Colorado Rockies visit the Seattle Mariners at T-Mobile Park. The game is set for Tuesday, September 23, 2025, at 9:40 PM. The Rockies have a record of 43-113 and are in last place in the NL West. They recently snapped a losing streak with a win but have struggled in their last 10 games, going 3-7.

The Mariners hold a record of 87-69 and are leading the AL West. They are on a four-game winning streak and have been strong in their last 10 games, with a 9-1 record. The game will feature starting pitchers McCade Brown for the Rockies and Bryce Miller for the Mariners. The weather forecast calls for mild conditions with few clouds, but the retractable roof at T-Mobile Park may limit any wind impact. Fans can catch the action on RSNW.

Rockies vs Mariners Key Information

• Sport: Baseball
• Teams: Colorado Rockies vs. Seattle Mariners
• Venue: T-Mobile Park in Seattle, WA
• Date: Tuesday, September 23, 2025
• Betting Odds:
  • Rockies Moneyline: +201
  • Mariners Moneyline: -247
  • Rockies Runline: +1.5 (-107)
  • Mariners Runline: -1.5 (-114)
  • Total Over: 8.0 (-112)
  • Total Under: 8.0 (-109)

The Rockies Can Win If…

The Colorado Rockies enter their next game with momentum from a recent win against the Los Angeles Angels, 3-1. Kyle Freeland pitched six strong innings, allowing just one run and striking out seven. Blaine Crim made a difference with a home run that brought in two runs.

The Rockies have shown they can hit for power, ranking 20th in home runs this season. Hunter Goodman leads the team with 30 home runs and a .279 batting average. Mickey Moniak is another key player, contributing 24 home runs and 68 RBIs.

Despite their pitching struggles, the Rockies have a chance against the Mariners. Seattle’s starter, Bryce Miller, has a 5.58 ERA, which the Rockies’ hitters can exploit. With players like Tyler Freeman and Mickey Moniak in the lineup, the Rockies have the tools to score runs and win the game.

The Mariners Can Win If…

The Seattle Mariners recently secured a 7-3 win against the Houston Astros. Logan Gilbert delivered a strong performance, pitching six innings and allowing just one earned run. Key players like J.P. Crawford and Cal Raleigh contributed with home runs, highlighting their offensive strength.

The Mariners have been consistent in their recent games, winning four out of their last five. Their team stats show strength in home runs, ranking third in the league with 230. With an on-base percentage ranked ninth, they can capitalize on scoring opportunities.

Looking ahead, the Mariners will rely on Bryce Miller as their starting pitcher. Despite a higher ERA, the Mariners’ offense can provide the run support needed against Colorado’s McCade Brown, who has struggled with an ERA of 9.17. With players like Cal Raleigh leading the league in home runs, the Mariners are well-positioned to take advantage of the Rockies’ pitching weaknesses.

Latest Betting Trends

• Seattle has won 14 of its last 15 games, including a sweep over division rival Houston.
• The Mariners are 7-1 in their past eight games at home.
• Bryce Miller has allowed three or fewer runs in six of his last eight starts.
• The Rockies are 3-7 across their past 10 road games.
• Colorado has played to the over in four of its last six games.
• The Mariners have covered the run line in nine of their past 11 wins.

The Lean

The Mariners are favored with a moneyline of -247 against the Rockies at +201. The Mariners have a stronger pitching staff with an ERA of 3.88 compared to the Rockies’ 6.01. Given these stats, my pick is the Mariners to win, with a projected score of Mariners 6, Rockies 3.

The total for the game is set at 8.0. The Rockies’ pitching struggles suggest a higher scoring game. The Mariners’ offense, ranked 3rd in home runs, is likely to take advantage. My pick is to go over 8.0, with a projected total of 9 runs.

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Mariners Surge Toward the Postseason

The Seattle Mariners enter the final week of the regular season with momentum on their side after winning 14 of their last 15 games. Their sweep of the Houston Astros put them three games ahead in the American League West and gave them the crucial head-to-head tiebreaker. With six games remaining, Seattle’s magic numbers are two to clinch a playoff spot, three to secure the division, and four to lock down the league’s No. 2 seed and a first-round bye.

Cal Raleigh continues to lead the way offensively with 58 home runs, setting a new single-season record for a switch-hitter. J.P. Crawford provided a key grand slam in Houston, while Logan Gilbert delivered six strong innings in the series finale. Fans tracking postseason implications can follow all the latest MLB previews for deeper insights.

The one concern is the health of rookie right-hander Bryan Woo, who left his last start with minor pectoral inflammation. His rotation spot against Colorado later in the week may be delayed, leaving Seattle’s pitching depth to cover the gap.

Rockies Find Relief in Small Victories

While the Rockies have endured a historically difficult season at 43-113, they managed to avoid the single-season loss record that many feared. By surpassing last year’s White Sox total of 121 defeats, Colorado has ensured it won’t be remembered as the worst modern-era club.

Kyle Freeland provided stability with a strong outing against the Angels, and his leadership has been one of the few bright spots. The Rockies are already shifting focus toward 2026, but they can still influence the postseason race as they meet teams in contention. Bettors looking to assess underdogs and longshot scenarios can review the MLB expert betting guide for strategies.

Pitching Matchup: Brown vs. Miller

The opener in Seattle features a battle between two young right-handers. Colorado’s McCade Brown, still searching for his first big-league win, carries a 0-4 record and a 9.17 ERA into his sixth career start. Command has been a problem, with four walks in his last outing against Miami.

Seattle counters with Bryce Miller, who has shown flashes of promise but owns a 5.58 ERA. He gave up three runs in Kansas City during his last start but will look to rebound in a favorable matchup against a struggling Rockies lineup. Mariners fans and bettors alike can monitor outcomes and trends through MLB game results

Contrasting Goals for Both Clubs

For Seattle, this week is about efficiently closing out the division race and setting up for October. With the Astros still within striking distance, the Mariners cannot afford to stumble. Their offense has been clicking, and if the rotation holds, they will enter the postseason as one of the league’s hottest teams.

Colorado’s focus is on finishing with effort and preparing young players for the future. Even in a lost year, playing spoiler against a contender adds some motivation. Those considering wagers can explore personalized MLB picks or connect with the best handicappers to evaluate betting angles.

Closing Outlook

The Mariners have positioned themselves perfectly for a playoff run, while the Rockies are simply looking to finish the season on a respectable note. With momentum on Seattle’s side and the magic numbers shrinking, this series could serve as the springboard to a postseason push.

Fans and bettors can stay ahead by checking out buy picks for expert analysis throughout the stretch run.