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MLB Prop Bets: Pittsburgh Pirates vs Boston Red Sox (August 15, 2026)

The Boston Red Sox (65-57) face the Pittsburgh Pirates (60-64) at PNC Park on Saturday at 7:15pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Sonny Gray is the probable pitcher for the Red Sox, while Jared Jones is the probable pitcher for the Pirates. The Red Sox are favored to win at -126, while the Pirates are at +104. The total runs line is set at 7.5, with OVER at -119 and UNDER at -101.

  • The Red Sox (+139) have a 59-63 Run Line record this season, while the Pirates (-168) hold a record of 56-68.
  • The Red Sox have a 55-63-4 O/U record this season (meaning 55 games have gone over the total runs line, 63 have gone under and four have resulted in a push). The Pirates have a 69-51-4 O/U record.

Scoring Insights

  • The Red Sox are averaging 4.4 runs per game this season (16th in the league). Comparatively, the Pirates are averaging +0.6 more at 5.0 runs (3rd).
  • In the field, the Red Sox are allowing only 3.8 runs per game this season (2nd in the league), while the Pirates are allowing an average of 4.8 runs (24th).

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 Red Sox are at .248 (ranking 9th in the Major leagues), while the Pirates are batting .256 (3rd).

Home Runs

  • In terms of total home runs this season, the Pirates have hit 151 (10th in the Major Leagues). Meanwhile, the Red Sox have managed 122 (T25th).

Runs Batted In

  • Finally, looking at their runs batted in, the Red Sox have recorded 518 RBIs to rank 17th in the MLB this season. Comparatively, the Pirates have recorded 596 RBIs to rank 3rd.

Pitching Insights:

Earned Run Average

  • The Pirates have an earned run average of 4.32 this season (22nd in the Majors), while The Red Sox have an ERA of 3.51 (2nd).

Strikeouts

  • Turning our attention to total strikeouts, the Red Sox have recorded 1042 this season, ranking 13th in the MLB. Meanwhile, the Pirates rank 3rd for total strikeouts, recording 1147.

Opponent Batting Average

  • Opponents are batting an average of .241 against the Pirates this season (15th in the Major Leagues). Comparatively, the Red Sox's opponents are at .240 (13th).

First Innings Moneyline

  • Here are their first innings moneyline records in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Red Sox 27-35-60 16-15-29 11-20-31 19-21-41 8-14-19 0-0-0 3-1-6
    Pirates 32-22-70 19-11-31 13-11-39 22-9-35 10-13-35 0-0-0 1-3-6

Lead After Three Innings

The Red Sox are -125 to lead after three innings, while the Pirates are -105.

  • Here are their records after the first three innings in 2026.
    Total Home Road Favorite Underdog Neutral Last 10
    Red Sox 50-44-28 29-20-11 21-24-17 37-26-18 13-18-10 0-0-0 4-3-3
    Pirates 50-42-32 31-14-16 19-28-16 31-19-16 19-23-16 0-0-0 2-5-3

NRFI/YRFI

The NRFI market is paying -135 and the YRFI is paying +100.

  • The NRFI is 58-64 in Red Sox games this season. The Pirates have a 66-58 NRFI record.

Last Time They Met

The Pirates recorded an 8-4 victory over the Red Sox at PNC Park yesterday. Rafael Flores dominated at the plate in that matchup, notching 1 home run, 2 singles and 2 RBIs. That result snapped the Red Sox's three-game winning streak against the Pirates at PNC Park.