Miami Marlins vs Arizona Diamondbacks Picks and Prediction for Monday September 14 2026

The Miami Marlins visit the Arizona Diamondbacks at Chase Field in Phoenix, Arizona, on Monday, September 14, 2026. First pitch is scheduled for 9:40 PM ET with coverage on MLB.TV. Miami enters at 73-76 overall and 29-43 on the road, while Arizona is 79-70 overall and 42-32 at home. The Marlins snapped a four-game losing streak with a 4-3 victory in their most recent game, while the Diamondbacks are 3-2 over their last five and remain 11.5 games behind first place in the NL West. Miami has dominated the season series, winning all three previous meetings. At the time of this writing the odds were not released. Be sure to check out our free MLB picks for more MLB predictions throughout the season.

Starting Pitchers

Miami is scheduled to start Sandy Alcantara, who enters at 13-10 with a 3.78 ERA and 1.22 WHIP through 200 innings. He has allowed 188 hits and 22 home runs while recording 143 strikeouts against 55 walks. Arizona counters with Corbin Burnes, who has worked only three innings this season and owns a 0-0 record, 0.00 ERA and 1.33 WHIP. He has allowed two hits with two strikeouts, two walks and no home runs. The starting-pitching comparison favors Miami based on the available 2026 workload. Arizona's starter has barely pitched this season, while Miami's starter has provided 200 innings with a solid ERA and WHIP.

Miami Has Already Proven It Can Handle Arizona

Miami enters this series at 73-76 overall and 29-43 on the road. The Marlins are only 1-4 over their last five games, but they ended a four-game losing streak with a 4-3 victory in their most recent contest. They are third in the NL East, 15 games behind first place. More importantly for this matchup, Miami is 3-0 against Arizona this season, winning those games 10-6, 8-0 and 2-0.

The Marlins are batting .249 with 660 runs, 1,236 hits and 152 home runs. They own a .327 on-base percentage and .401 slugging percentage. Miami's pitching staff has a 4.10 ERA and 1.28 WHIP while opponents are batting .235. The staff has recorded 1,198 strikeouts against 516 walks, and Miami is 35-26 in day games.

Miami's offensive profile gives it an interesting advantage in what otherwise looks like a closely matched game. The Marlins have the higher batting average, more runs, more hits, more home runs, a higher on-base percentage and a higher slugging percentage than Arizona. The biggest concern is their 29-43 road record, but their previous success against the Diamondbacks and substantial starting-pitching workload advantage make Miami dangerous as the visitor.

Arizona Returns Home With the Better Overall Record

Arizona enters Monday at 79-70 overall and an impressive 42-32 at Chase Field. The Diamondbacks are 3-2 over their last five games, although they are coming off a 6-2 loss. Their recent stretch also includes victories by scores of 9-1, 5-3 in 11 innings and 5-4 in 10 innings. Arizona sits third in the NL West, 11.5 games behind the division leader.

The Diamondbacks are batting .242 with 659 runs, 1,209 hits and 145 home runs. They carry a .315 on-base percentage and .394 slugging percentage. Arizona owns a 4.09 team ERA and 1.28 WHIP while opponents are hitting .248. The pitching staff has recorded 1,029 strikeouts against 446 walks, and Arizona is 31-23 in day games.

Arizona's strongest advantage is its home record, but there is surprisingly little separating these clubs statistically. Their team ERAs differ by only 0.01 and both have a 1.28 WHIP. Miami actually owns the better numbers across most of the major offensive categories. Arizona therefore needs its home-field advantage and overall consistency to overcome a Miami club that has already beaten it three times this season.

Miami Marlins vs Arizona Diamondbacks Picks and Prediction

Pick: Miami Marlins Moneyline

The Miami Marlins Moneyline is the preferred side. Arizona has the superior overall and home records, but Miami matches up better statistically than those records suggest. The Marlins lead Arizona in batting average, runs, hits, home runs, OBP and slugging while the clubs have nearly identical team ERAs and identical WHIPs. Miami has also won all three meetings this season, and the scheduled starting-pitching matchup provides another reason to take the visitor. Arizona's starter has only three innings of 2026 work compared with 200 innings for Miami's scheduled starter.

Pick: Under 8.5

Take the Under if the total is set at 8.5 or higher. Miami's scheduled starter brings a 3.78 ERA and 1.22 WHIP into the matchup, while the Marlins have held Arizona scoreless in two of their three meetings this season. The two pitching staffs also enter with almost identical season numbers, with Miami at a 4.10 ERA and Arizona at 4.09. Although the first meeting produced 16 runs, the next two finished with totals of eight and two, making the Under the preferred position at 8.5 or better.

Final Picks: Miami Marlins Moneyline and Under 8.5

This preview was completed on Sunday. Starting pitchers, betting lines and other game information are subject to change before the game begins.