Giants vs Mariners Prediction, Odds & Player Prop Bets Today – MLB, Aug 23

Seattle Mariners' J.P. Crawford follows through during an at-bat a baseball game against the Texas Rangers, Saturday, Sept. 30, 2023, in Seattle. (AP Photo/Lindsey Wasson)
(AP Photo/Lindsey Wasson)
  • The Mariners are -155 favorites vs the Giants
  • Giants vs Mariners Over / Under today: 7.5 Runs
  • Giants / Mariners TV Channel: RTNW | NSBA | MLBN

The San Francisco Giants (+130) visit T-Mobile Park to take on the Seattle Mariners (-155) on Friday, August 23, 2024. First pitch is scheduled for 10:10pm EDT in Seattle, WA.

This season, the Giants are 65-64 against the spread (ATS), while the Mariners are 54-74 ATS.

Giants vs Mariners Starting Pitchers Today:

  • Giants starting pitcher: Hayden Birdsong 3-3, 5.05 ERA
  • Mariners starting pitcher: Luis Castillo 10-12, 3.52 ERA

Giants vs. Mariners Odds, Run Line, Over/Under & Moneyline

SpreadOver / UnderMoneyline
Giants+1.5 -175O 7.5 -125+130
Mariners -1.5 +145U 7.5 +105-155

Giants vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Friday‘s MLB game with 55.3% confidence, factoring in game simulations, recent player performances, starting pitchers and injuries.


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We’ve highlighted some favorite MLB player prop bets for Giants players for Friday‘s game, looking at profitable historical betting trends:

Best Giants Player Prop Bets Today:

  • Tyler Fitzgerald has hit the Home Runs Over in 12 of his last 32 games (+48.00 Units / 150% ROI)
  • Tyler Fitzgerald has hit the Hits Over in 31 of his last 38 games (+19.55 Units / 28% ROI)
  • Tyler Fitzgerald has hit the Total Bases Over in 27 of his last 38 games (+17.25 Units / 37% ROI)
  • Tyler Fitzgerald has hit the Hits Runs and RBIs Over in 26 of his last 38 games (+13.40 Units / 29% ROI)
  • Tyler Fitzgerald has hit the Runs Over in 12 of his last 15 away games (+11.85 Units / 74% ROI)

And here are some favorite MLB player prop bets for Mariners players for Friday‘s game, looking at profitable historical betting trends:

Best Mariners Player Prop Best Bets Today:

  • Luke Raley has hit the Home Runs Over in 5 of his last 11 games at home (+21.70 Units / 197% ROI)
  • Julio Rodriguez has hit the Runs Under in 27 of his last 35 games (+15.90 Units / 30% ROI)
  • Julio Rodriguez has hit the Hits Runs and RBIs Under in 25 of his last 35 games (+14.70 Units / 37% ROI)
  • Randy Arozarena has hit the Walks Over in 10 of his last 14 games (+12.65 Units / 90% ROI)
  • Julio Rodriguez has hit the Hits Under in 31 of his last 50 games (+12.50 Units / 14% ROI)
  • The San Francisco Giants have hit the Game Total Over in 36 of their last 63 away games (+8.75 Units / 13% ROI)
  • The San Francisco Giants have hit the Team Total Under in 22 of their last 34 games (+8.50 Units / 21% ROI)
  • The San Francisco Giants have covered the Run Line in 11 of their last 17 games (+6.75 Units / 35% ROI)
  • The San Francisco Giants have hit the 1st Five Innings (F5) Team Total Over in 54 of their last 97 games (+6.10 Units / 5% ROI)
  • The San Francisco Giants have covered the 1st Five Innings (F5) Run Line in 29 of their last 50 games (+5.20 Units / 8% ROI)
  • The Seattle Mariners have hit the Game Total Under in 41 of their last 62 games at home (+18.90 Units / 27% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Under in 37 of their last 63 games at home (+10.45 Units / 14% ROI)
  • The Seattle Mariners have hit the Team Total Under in 35 of their last 58 games at home (+10.15 Units / 15% ROI)
  • The Seattle Mariners have hit the Moneyline in 33 of their last 53 games at home (+6.15 Units / 8% ROI)
  • The Seattle Mariners have covered the Run Line in 26 of their last 53 games at home (+5.25 Units / 9% ROI)

Giants Against the Spread (ATS) Record

Against the spread this season, the Giants are 64-65 against the Run Line (-5 Units / -3.01% ROI).

  • 65-64 when betting on the Moneyline for -8.05 Units / -4.84% ROI
  • 65-60 when betting on the total runs Over for -0.45 Units / -0.32% ROI
  • 60-65 when betting on the total runs Under for -11.8 Units / -8.27% ROI

Mariners Against the Spread (ATS) Record

Against the spread this season, the Mariners are 54-74 against the Run Line (-26.25 Units / -16.19% ROI).

  • 64-64 when betting on the Moneyline for -15.35 Units / -9.16% ROI
  • 55-68 when betting on the total runs Over for -18.9 Units / -13.59% ROI
  • 68-55 when betting on the total runs Under for +7.4 Units / 5.26% ROI

Mariners vs Giants Home Run Prop Bets Today

Over Under
Cal Raleigh (SEA) 0.5 +340 0.5 -450
Matt Chapman (SF) 0.5 +375 0.5 -550
Mike Yastrzemski (SF) 0.5 +400 0.5 -550
Julio Rodriguez (SEA) 0.5 +425 0.5 -600
Mitch Haniger (SEA) 0.5 +450 0.5 -650

Mariners vs Giants Total Hits Prop Bets Today

Over Under
Julio Rodriguez (SEA) 0.5 -250 0.5 +185
Victor Robles (SEA) 0.5 -210 0.5 +160
LaMonte Wade Jr (SF) 0.5 -175 0.5 +135
Heliot Ramos (SF) 0.5 -175 0.5 +135
Randy Arozarena (SEA) 0.5 -165 0.5 +125

Mariners vs Giants RBI Prop Bets Today

Over Under
Julio Rodriguez (SEA) 0.5 +155 0.5 -200
Cal Raleigh (SEA) 0.5 +155 0.5 -210
Mitch Haniger (SEA) 0.5 +175 0.5 -250
Mike Yastrzemski (SF) 0.5 +180 0.5 -250
Matt Chapman (SF) 0.5 +180 0.5 -250

Mariners vs Giants Strikeout Prop Bets Today

Over Under
Luis Castillo (Sea) 6.5 -145 6.5 +110
Hayden Birdsong (SF) 6.5 +120 6.5 -155

Hayden Birdsong has allowed three-ball counts to 35% of batters they faced (18/52 PA’s) this month (3 games) — 2nd highest in MLB among starting pitchers with at least 6 total IP; League Avg: 20% — first Percentile.

Hayden Birdsong has an ERA of 10.64 (11.0 IP)this month (3 games) — 3rd highest in MLB among starting pitchers with at least 6 total IP; League Avg: 4.25 — first Percentile.

Hayden Birdsong has a strike rate of just 60% (137/229) this month (3 games) — 11th lowest in MLB among starting pitchers with at least 6 total IP; League Avg: 64% — sixth Percentile.

Hayden Birdsong has allowed a slugging percentage of .659 (29 Total Bases / 44 ABs) this month (3 games) — 6th highest in MLB among starting pitchers with at least 6 total IP; League Avg: .420 — third Percentile.

Mariners Starting Pitcher Stats & Trends

Luis Castillo has allowed a just .316 SLG vs right-handed batters (seventh best)– 90th Percentile and .482 vs left-handed batters this season (third worst among qualified SPs)– sixth Percentile.

Luis Castillo has a strikeout rate of 39% (71 SO in 181 PAs) in PAs ending on elevated fastballs this season — 4th best among qualified SPs in MLB; League Avg: 28% — 94th Percentile.

Luis Castillo has walked 10 of 234 batters (4%) when going through the lineup the first time in a game this season — tied for 8th best among qualified SPs in MLB; League Avg: 7% — 87th Percentile.

Luis Castillo has walked 60 of 756 batters (8%) when going through the lineup the second time in a game since the 2022 season — 5th highest among qualified SPs in MLB; League Avg: 7% — 21st Percentile.

Giants Keys to the Game vs. the Mariners

The Giants are 9-51 (.150) when trailing entering the 8th inning this season — 4th best in MLB; League Avg: .103.

The Giants are 22-11 (.667) after a home loss this season — tied for 2nd best in MLB; League Avg: .534.

The Giants are just 38-40 (.487) after a win as favorites since the 2023 season — 5th lowest in MLB; League Avg: .573.

The Giants are just 46-75 (.380) after a road loss since the 2022 season — 4th lowest in MLB; League Avg: .462.

Mariners Keys to the Game vs. the Giants

The Mariners are just 5-20 (.200) when their opponents score in the first inning this season — 2nd lowest in MLB; League Avg: .356.

The Mariners are 105-17 (.861) when scoring 5 or more runs since the 2023 season — 2nd best in MLB; League Avg: .790.

The Mariners are 58-7 (.892) when they’ve had 5 or more XBH since the 2022 season — best in MLB; League Avg: .799.

The Mariners are 130-3 (.977) when leading entering the 9th inning since the 2023 season — 2nd best in MLB; League Avg: .948.

Giants hitters have 1,288 strikeouts in 5,202 PA’s (25%) against LHP since the 2022 season — 4th highest in MLB; League Avg: 22%.

Giants hitters have an OPS of just .486 (5,908 PA’s) with two-strikes since last season — 4th lowest in MLB; League Avg: .517.

Giants hitters have an OBP of just .186 (242 PA’s) with two-strikes over the last 14 days — lowest in MLB; League Avg: .239.

The Giants are batting just .156 with two-strikes since last season — 4th lowest in MLB; League Avg: .171.

The Mariners are batting just .209 against LHP this season — lowest in MLB; League Avg: .247.

The Mariners are batting just .195 when facing the starting pitcher for the 3rd time in a game this season — lowest in MLB; League Avg: .264.

The Mariners are batting just .224 when facing the starting pitcher for the 3rd time in a game since last season — lowest in MLB; League Avg: .265.

The Mariners are batting just .117 on pitches out of the zone this season — 2nd lowest in MLB; League Avg: .152.

Opponents have a groundball rate of 49% against Giants pitchers since last season — highest in MLB; League Avg: 43%.

Opponents have a groundball rate of 49% against Giants pitchers since the 2022 season — highest in MLB; League Avg: 43%.

Opponents have a groundball rate of 49% against Giants pitchers this season — highest in MLB; League Avg: 43%.

Giants pitchers have walked 246 of 4,021 batters (6%) when facing the leadoff batter in the inning since the 2022 season — best in MLB; League Avg: 8%.

The Mariners pitchers have allowed division opponents to score first in just 22% of their games this season — lowest in MLB; League Avg: 50%.

The Mariners have allowed 3.03 runs per game (191/63) at home this season — best in MLB; League Avg: 4.39.

Mariners pitchers have an ERA of 2.41 (284.0 IP) against division opponents this season — best in MLB; League Avg: 4.11.

Mariners pitchers have allowed an OBP of just .254 (1,135 PA’s) when facing the leadoff batter in the inning this season — best in MLB; League Avg: .304.

Mariners vs. Giants Injuries Tonight That May Affect Prop Bets 

  • J.P. Crawford (Seattle Mariners): Finger, 10-Day IL
  • Dominic Canzone (Seattle Mariners): Thigh, 10-Day IL
  • Jackson Kowar (Seattle Mariners): Elbow, 60-Day IL
  • Sam Haggerty (Seattle Mariners): Achilles, 60-Day IL
  • Matt Brash (Seattle Mariners): Elbow, 60-Day IL
  • Julio Rodriguez (Seattle Mariners): Ankle, 10-Day IL
  • Alex Cobb (San Francisco Giants): Hip, 60-Day IL
  • Jung Hoo Lee (San Francisco Giants): Shoulder, 60-Day IL
  • Cole Waites (San Francisco Giants): Elbow, 60-Day IL
  • TJ Hopkins (San Francisco Giants): Shoulder, 60-Day IL
  • Tristan Beck (San Francisco Giants): Arm, 60-Day IL
  • Robbie Ray (San Francisco Giants): Elbow, 60-Day IL
  • Keaton Winn (San Francisco Giants): Elbow, 15-Day IL
  • Tom Murphy (San Francisco Giants): Knee, 60-Day IL
  • Kai-Wei Teng (San Francisco Giants): Undisclosed, 7-Day IL
  • Wilmer Flores (San Francisco Giants): Shoulder, 7-Day IL
  • Ethan Small (San Francisco Giants): Oblique, 60-Day IL

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About the Author

Shane Jackson

Read More @Sjacksonmgm

Shane Jackson is a Web Content Writer for BetMGM, covering MLB and NBA. After graduating from the University of Kansas, his previous stops include MLB.com, Lawrence Journal-World, Manhattan Mercury, Bet Chicago Sports, WynnBET, and Sportsbook Review.

Shane Jackson is a Web Content Writer for BetMGM, covering MLB and NBA. After graduating from the University of Kansas, his previous stops include MLB.com, Lawrence Journal-World, Manhattan Mercury, Bet Chicago Sports, WynnBET, and Sportsbook Review.