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MLB Prop Bets: Arizona Diamondbacks vs Miami Marlins (September 14, 2026)

The Miami Marlins (74-76) face the Arizona Diamondbacks (79-71) at Chase Field on Monday at 9:40pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Sandy Alcantara is the probable pitcher for the Marlins, while Corbin Burnes is the probable pitcher for the Diamondbacks. The Diamondbacks are favored to win at -137, while the Marlins are at +114. The total runs line is set at 8.0, with OVER at -108 and UNDER at -111.

  • The Marlins (-187) have a 74-76 Run Line record this season, while the Diamondbacks (+153) hold a record of 83-67.
  • The Marlins have a 76-71-3 O/U record this season (meaning 76 games have gone over the total runs line, 71 have gone under and three have resulted in a push). The Diamondbacks have a 61-80-9 O/U record.

Scoring Insights

  • The Marlins are averaging 4.4 runs per game this season (17th in the league). Comparatively, the Diamondbacks are averaging 4.4 (18th).
  • In the field, the Marlins are allowing 4.4 runs per game this season (12th in the league), while the Diamondbacks are allowing an average of 4.4 runs (14th).

Let's take a look at how these teams perform in some other key statistical areas.

Batting Insights:

Batting Average

  • Looking at their batting averages this season, the Marlins are at .249 (ranking 7th in the Major leagues), while the Diamondbacks are batting .243 (18th).

Home Runs

  • In terms of total home runs this season, the Diamondbacks have hit 147 (T26th in the Major Leagues). Meanwhile, the Marlins have managed 153 (25th).

Runs Batted In

  • Finally, looking at their runs batted in, the Marlins have recorded 637 RBIs to rank 16th in the MLB this season. Comparatively, the Diamondbacks have recorded 635 RBIs to rank T17th.

Pitching Insights:

Earned Run Average

  • The Diamondbacks have an earned run average of 4.09 this season (12th in the Majors), while The Marlins have an ERA of 4.10 (13th).

Strikeouts

  • Turning our attention to total strikeouts, the Marlins have recorded 1205 this season, ranking 21st in the MLB. Meanwhile, the Diamondbacks rank 29th for total strikeouts, recording 1039.

Opponent Batting Average

  • Opponents are batting an average of .249 against the Diamondbacks this season (20th in the Major Leagues). Comparatively, the Marlins' opponents are at .235 (7th).

First Innings Moneyline

  • Here are their first innings moneyline records in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Marlins 28-28-94 15-13-50 13-15-44 14-9-46 14-19-48 0-0-0 1-3-6
    Diamondbacks 30-41-79 18-16-39 12-25-38 17-14-32 13-27-47 0-0-2 0-2-8

Lead After Three Innings

  • Here are their records after the first three innings in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Marlins 56-56-38 35-23-20 21-33-18 29-18-22 27-38-16 0-0-0 2-5-3
    Diamondbacks 45-70-35 28-26-19 16-43-16 26-21-16 19-49-19 1-1-0 2-4-4

NRFI/YRFI

  • The NRFI is 87-63 in Marlins games this season. The Diamondbacks have a 70-80 NRFI record.

Last Time They Met

The Marlins recorded a 2-0 victory over the Diamondbacks at LoanDepot Park when these teams last met on June 11. Otto Lopez led the way to that victory, hitting a home run. The Marlins have now won six straight against the Diamondbacks.