Miami Marlins defeat Arizona Diamondbacks 4-2: Recap, Betting Results & AiQ Picks

Tue, Sep 15, 2026 · MLB · Miami Marlins 4, Arizona Diamondbacks 2

The Miami Marlins won 4–2 over the Arizona Diamondbacks, covering the +1.5 spread as an underdog. The total finished under 8.5, with just six combined runs scored.

Miami Marlins vs. Arizona Diamondbacks final score and game recap

Tuesday's game at Chase Field unfolded as a low-scoring duel. Arizona took a 1–0 lead in the first inning, but Miami tied it in the fourth. The score remained 1–1 through the fifth. The Marlins broke through in the eleventh, scoring three runs to seal a 4–2 victory. Arizona added one run in the eleventh as well, but it came too late.

Who covered the spread in Miami Marlins vs. Arizona Diamondbacks?

The Miami Marlins covered the +1.5 spread, winning outright by two runs. The line opened and closed at Arizona Diamondbacks –1.5 with no movement. AiQ's pick of Miami Marlins +1.5 at 58% confidence graded as a WIN.

Did Miami Marlins vs. Arizona Diamondbacks go over or under the total?

The game went under the 8.5 total. Six combined runs fell 2.5 short of the line. The total opened at 8 and closed at 8.5, moving up 0.5. AiQ's over 8.5 pick at 62% confidence graded as a LOSS.

How did AiQ's Miami Marlins vs. Arizona Diamondbacks predictions do?

AiQ finished 1–2 across every graded pick.

AiQ correctly identified the spread outcome but missed both the moneyline and the total.

Miami Marlins vs. Arizona Diamondbacks odds: sportsbook value and line movement

The moneyline closed with the Marlins at +132 and the Diamondbacks at –157, implying win probabilities of 41% and 59% after removing the 4.2% vig. A $100 wager on Miami at +132 returned $132 profit. AiQ's internal expected value calculation placed the Diamondbacks at –152, a negative-EV price. The market's implied 58% probability for the Marlins covering the spread matched AiQ's calibrated estimate.

The Miami Marlins sit at 75–76 after 151 games, with a 45–32 home record and 30–44 away record. In 121 games with a recorded closing spread, they are 65–56 against the spread. In those same 121 games, they went over 62 times and finished under 57 times. Their last five results are W, L, W, W, L.

The Arizona Diamondbacks are 78–71 through 149 games, with a 41–33 home record and 37–38 away/neutral record. They have covered the spread in 57 of 113 games with a recorded line. In those 113 contests, they went over 49 times and finished under 61 times. Their last five results are L, W, L, L, W.

What's next for Miami Marlins and Arizona Diamondbacks?

The Marlins travel to San Diego to face the Padres on Friday, September 18. The Diamondbacks remain at home and host the New York Yankees the same night.