Mariners vs. Red Sox Prediction: MLB Betting Lines, Stats and Picks – July 31, 2023

Written By PlayPicks Staff on July 31, 2023

The Seattle Mariners (54-51) and Boston Red Sox (56-49) clash in the first of a three-game series on Monday at T-Mobile Park, at 9:40 PM ET. The Mariners are coming off a series victory over the Diamondbacks, and the Red Sox a series loss to the Giants.

The Red Sox are an underdog (+107 on the moneyline to win) when they visit the Mariners (-127). The total for this game is set at 7.5.

The betting insights in the article below use the latest odds as of July 31, 2023 at 9:12 PM ET. Ready to bet? Click here to get the best DraftKings Sportsbook deposit bonus!

Mariners vs Red Sox Betting Lines

Favorite Favorite Moneyline Underdog Moneyline Total
Mariners -127 +107 7.5

Mariners Betting Insights

  • This season, the Mariners have won 38 out of the 70 games, or 54.3%, in which they’ve been favored.
  • This season Seattle has won 29 of its 53 games, or 54.7%, when favored by at least -127 on the moneyline.
  • The Mariners have a 55.9% chance to win this game based on the implied probability of the moneyline.
  • So far this season, Seattle and its opponents have hit the over in 51 of 105 games with a total.
  • The Mariners are 49-56-0 against the spread this season.

Mariners Last 10 Games Trend

Stat Avg/Total
Record 7-3
Runs Per Game 5.2
HR 17
ERA 3.74
K/9 10.2

Red Sox Betting Insights

  • The Red Sox have been chosen as underdogs in 56 games this year and have walked away with the win 29 times (51.8%) in those games.
  • Boston has a mark of 23-17 in contests where sportsbooks favor it by +107 or worse on the moneyline.
  • The Red Sox have an implied victory probability of 48.3% according to the moneyline set for this matchup.
  • Boston and its opponents have hit the over in 53 of its 105 games with a total set by oddsmakers this season.
  • The Red Sox are 55-50-0 against the spread in their 105 games that had a posted line this season.

Red Sox Last 10 Games Trend

Stat Avg/Total
Record 5-5
Runs Per Game 4.3
HR 14
ERA 3.17
K/9 8.8

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Mariners Probable Pitcher – George Kirby

  • Kirby and his team have a record of 10-10-0 against the spread when he starts.
  • The right-hander’s last appearance was on Tuesday, when he threw four innings against the Minnesota Twins, giving up five earned runs while allowing seven hits.
  • Kirby has 16 starts of five or more innings this season in 20 chances. He averages 6.2 innings per outing.
  • He has made 20 appearances and finished four of them without allowing an earned run.
  • When Kirby starts a game and his team is the favorite on the moneyline, they have a record of 9-6.
  • Kirby’s team has an 11-9 record in his starts this season.
  • Out of Kirby’s 20 starts with a total this season, nine have hit the over.

Mariners Relief Pitchers

Name Relief App. IP Ks ERA Holds Saves
Matt Brash 50 43.1 76 3.53 14 1
Paul Sewald 45 43 60 2.93 0 21
Justin Topa 45 41.2 38 2.59 16 2
Gabe Speier 43 35 37 3.86 10 0
Tayler Saucedo 31 31.1 32 2.3 0 0

Red Sox Probable Pitcher – Nick Pivetta

  • Pivetta makes the start for the Red Sox, his ninth of the season. He is 7-5 with a 4.11 ERA and 100 strikeouts in 81 2/3 innings pitched.
  • In his most recent appearance — out of the bullpen on Tuesday — the righty threw five scoreless innings against the Atlanta Braves while surrendering three hits.
  • Pivetta has put together nine starts this year that he pitched five or more innings.
  • He will attempt for his fourth straight appearance without allowing an earned run.
  • The Red Sox are 4-3 in Pivetta’s seven starts this season that they were the moneyline underdog.
  • Pivetta’s team has won four of his eight starts.
  • Pivetta’s starts hit the over on the run total four times in eight games with a set total this season.

Red Sox Relief Pitchers

Name Relief App. IP Ks ERA Holds Saves
Josh Winckowski 36 58 50 2.95 12 2
Chris Martin 36 33.1 30 1.62 16 1
Kenley Jansen 36 34.1 41 3.15 0 23
Brennan Bernardino 25 36 41 2.5 3 0
Richard Bleier 22 26.2 14 4.72 2 0

Mariners Hitting Trends

  • The Mariners are 26-10 this season in games when they hit two or more home runs.
  • Seattle is 16-1 in games this season when it has put up five or more extra-base hits.
  • The club is 42-22 in the games this season it has put up at least eight hits.
  • Seattle has a 47-7 record in games this season when it scored five or more runs.
  • The Mariners have drawn at least five walks in 37 games this season, and are 25-12 in those contests.

Red Sox Hitting Trends

  • They’ve hit two or more homers in 34 games this season and are 24-10 in those matchups.
  • Boston has won 24 of its 33 games with five or more extra-base hits this season.
  • They have won 47 of the 76 games in which they’ve collected eight or more hits this season.
  • In 56 games this season with five or more runs scored, it has posted a record of 46-10.
  • They have won 13 of their 23 games this season in which they’ve drawn more than four free passes.

Mariners vs. Red Sox Prediction

Moneyline Pick: Mariners (-127)
Over/Under Pick: Over (7.5)

Predictions are calculated by a data-driven algorithm derived from offensive performance metrics and probable starting pitchers.

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