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MLB Prop Bets: Pittsburgh Pirates vs Arizona Diamondbacks (July 27, 2026)

The Arizona Diamondbacks (55-51) face the Pittsburgh Pirates (54-52) at PNC Park on Monday at 6:40pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Merrill Kelly is the probable pitcher for the Diamondbacks, while Mitch Keller is the probable pitcher for the Pirates. The Pirates are favored to win at -126, while the Diamondbacks are at +104. The total runs line is set at 9.0, with OVER at -105 and UNDER at -115.

  • The Diamondbacks (-188) have a 57-49 Run Line record this season, while the Pirates (+154) hold a record of 51-55.
  • The Diamondbacks have a 43-54-9 O/U record this season (meaning 43 games have gone over the total runs line, 54 have gone under and nine have resulted in a push). The Pirates have a 61-42-3 O/U record.

Scoring Insights

  • The Diamondbacks are averaging 4.5 runs per game this season (13th in the league). Comparatively, the Pirates are averaging +0.7 more at 5.2 runs (2nd).
  • In the field, the Diamondbacks are allowing 4.5 runs per game this season (18th in the league), while the Pirates are allowing an average of 4.8 runs (23rd).

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 Diamondbacks are at .242 (ranking 18th in the Major leagues), while the Pirates are batting .260 (2nd).

Home Runs

  • In terms of total home runs this season, the Pirates have hit 135 (9th in the Major Leagues). Meanwhile, the Diamondbacks have managed 103 (28th).

Runs Batted In

  • Finally, looking at their runs batted in, the Diamondbacks have recorded 457 RBIs to rank 13th in the MLB this season. Comparatively, the Pirates have recorded 529 RBIs to rank 2nd.

Pitching Insights:

Earned Run Average

  • The Pirates have an earned run average of 4.32 this season (21st in the Majors), while The Diamondbacks have an ERA of 4.27 (19th).

Strikeouts

  • Turning our attention to total strikeouts, the Pirates have recorded an impressive 979 this season, ranking 3rd in the MLB. Contrastingly, the Diamondbacks rank 30th for total strikeouts, recording only 714.

Opponent Batting Average

  • Opponents are batting an average of .240 against the Pirates this season (15th in the Major Leagues). Comparatively, the Diamondbacks' opponents are at .254 (26th).

First Innings Moneyline

  • Here are their first innings moneyline records in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Diamondbacks 23-28-55 13-11-27 10-17-26 13-9-24 10-19-31 0-0-2 2-2-6
    Pirates 31-17-58 18-8-28 13-9-30 21-6-28 10-11-30 0-0-0 0-1-9

Lead After Three Innings

  • Here are their records after the first three innings in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Diamondbacks 33-50-23 21-17-13 11-32-10 21-13-12 12-37-11 1-1-0 3-5-2
    Pirates 46-34-26 29-11-14 17-23-12 29-14-12 17-20-14 0-0-0 4-1-5

NRFI/YRFI

  • The NRFI is 47-59 in Diamondbacks games this season. The Pirates have a 55-51 NRFI record.

Last Time They Met

The Pirates recorded a 4-2 victory over the Diamondbacks at Chase Field when these teams last met on May 7. Brandon Lowe dominated at the plate in that matchup, notching 1 home run, 2 singles and an RBI.