Reds vs Mariners Prediction, Odds & Player Prop Bets Today – MLB, Mar 21

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Seattle Mariners' Ty France looks on during a baseball game against the Texas Rangers, Saturday, Sept. 30, 2023, in Seattle. (AP Photo/Lindsey Wasson)
(AP Photo/Lindsey Wasson)
BetMGM Betting @BETMGM Mar 21, 2024, 11:00 AM

The Cincinnati Reds (+120) visit Peoria Sports Complex to take on the Seattle Mariners (-140) on Thursday, March 21, 2024. First pitch is for this Spring Training game is scheduled for 9:40pm EDT in Peoria, AZ.

This season, the Reds are 5-8 against the spread (ATS), while the Mariners are 8-6 ATS.

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

Moneyline
Reds+120
Mariners -140

Reds vs Mariners Prediction for Today’s Game

Based on recent trends the model predicts the Mariners will win Thursday‘s matchup with 54.1% confidence, based on game simulations, recent player performances, starting pitchers and injuries.


Bet now on Reds vs Mariners and all games with BetMGM


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

Best Reds Player Prop Bets Today:

  • Spencer Steer has hit the Hits Over in his last 2 away games (+2.85 Units / 76% ROI)
  • Jonathan India has hit the Hits Over in his last 2 away games (+2.00 Units / 38% ROI)
  • Harrison Bader has hit the RBIs Under in his last 2 games (+2.00 Units / 34% ROI)
  • Nick Senzel has hit the RBIs Over in 1 of his last 2 away games (+1.05 Units / 52% ROI)
  • Noelvi Marte has hit the Hits Over in 1 of his last 2 games (+1.00 Units / 50% ROI)

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

Best Mariners Player Prop Best Bets Today:

  • Julio Rodriguez has hit the Hits Under in his last 5 games (+5.80 Units / 49% ROI)
  • Sam Haggerty has hit the Runs Under in his last 4 games at home (+4.00 Units / 39% ROI)
  • Jose Caballero has hit the Hits Runs and RBIs Over in his last 2 games (+2.00 Units / 65% ROI)
  • Emerson Hancock has hit the Pitching Outs Under in his last game (+1.05 Units / 105% ROI)
  • Josh Rojas has hit the Singles Under in his last game (+1.00 Units / 43% ROI)
  • The Cincinnati Reds have hit the Moneyline in 41 of their last 67 away games (+23.65 Units / 34% ROI)
  • The Cincinnati Reds have covered the Run Line in 96 of their last 161 games (+20.80 Units / 10% ROI)
  • The Cincinnati Reds have hit the Game Total Under in 45 of their last 72 games (+16.80 Units / 21% ROI)
  • The Cincinnati Reds have hit the Team Total Over in 41 of their last 65 away games (+14.05 Units / 18% ROI)
  • The Cincinnati Reds have hit the 1st Five Innings (F5) Team Total Under in 12 of their last 18 away games (+4.93 Units / 22% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Moneyline in 33 of their last 61 games (+11.71 Units / 13% ROI)
  • The Seattle Mariners have covered the 1st Five Innings (F5) Run Line in 33 of their last 52 games (+11.13 Units / 18% ROI)
  • The Seattle Mariners have hit the Moneyline in 50 of their last 82 games (+8.75 Units / 7% ROI)
  • The Seattle Mariners have hit the 1st Five Innings (F5) Team Total Over in 46 of their last 78 games at home (+8.55 Units / 9% ROI)
  • The Seattle Mariners have hit the Team Total Under in 9 of their last 11 games at home (+7.10 Units / 60% ROI)

Reds Against the Spread (ATS) Record

Against the spread this Spring Training, the Reds are 6-9 against the Run Line (-5.9 Units / -28.89% ROI).

  • 5-8 when betting on the Moneyline for -3.47 Units / -19.14% ROI
  • 7-7 when betting on the total runs Over for -1 Units / -6.04% ROI
  • 7-7 when betting on the total runs Under for -0.88 Units / -5.36% ROI

Mariners Against the Spread (ATS) Record

Against the spread this Spring Training, the Mariners are 8-6 against the Run Line (+1.5 Units / 8.25% ROI).

  • 5-8 when betting on the Moneyline for -3.66 Units / -21.02% ROI
  • 10-4 when betting on the total runs Over for +5.51 Units / 35.34% ROI
  • 4-10 when betting on the total runs Under for -6.9 Units / -45.36% ROI

Opponents had a groundball rate of 54% (169/311) against Nick Martinez in the 2023 season — 8th highest among in NL; League Avg: 45% — 91st Percentile.

Opponents had a groundball rate of 74% (32/43) against Nick Martinez’s curve and slider in the 2023 season — highest among qualified RPs in MLB*; League Avg: 42% — 100th Percentile.

63% of Nick Martinez strikeouts were located out of the zone in the 2023 season — 10th highest among in NL; League Avg: 51% — 88th Percentile.

Nick Martinez struck out 20 batters on three pitches in the 2023 season — tied for 6th most among in NL — 95th Percentile.

Mariners Starting Pitcher Stats & Trends

Bryce Miller had a strike rate of 71% (460/648) in two strike counts in the 2023 season — 2nd highest in MLB among starting pitchers with at least 64 total IP; League Avg: 65% — 99th Percentile.

Bryce Miller allowed an OBP of just .234 (282 PA’s) against right-handed batters in the 2023 season — best in MLB among starting pitchers with at least 64 total IP; League Avg: .309 — 100th Percentile.

Hitters swung at 67% of Bryce Miller’s pitches (431/648) with two-strikes in the 2023 season — 2nd highest in MLB among starting pitchers with at least 64 total IP; League Avg: 60% — 99th Percentile.

Bryce Miller threw fastballs 66% of the time (247/377) with runners in scoring position in the 2023 season — 2nd highest in MLB among starting pitchers with at least 64 total IP; League Avg: 44% — 99th Percentile.

Reds Keys to the Game vs. the Mariners

The Reds are just 48-38 (.558) when they’ve hit 2 or more home runs since the 2022 season — lowest in MLB; League Avg: .697.

The Reds are just 40-46 (.465) when they’ve scored in the first inning since the 2022 season — lowest in MLB; League Avg: .637.

The Reds are 24-10 (.706) after a win as favorites since the 2022 season — best in MLB; League Avg: .593.

The Reds are just 17-24 (.415) after a loss as favorites since the 2022 season — 2nd lowest in MLB; League Avg: .584.

Mariners Keys to the Game vs. the Reds

The Mariners were 13-8 (.619) after a win as underdogs in the 2023 season — 2nd best in MLB; League Avg: .433.

The Mariners are 31-30 (.508) after a win as underdogs since the 2022 season — 2nd best in MLB; League Avg: .417.

The Mariners are 125-23 (.845) when scoring 5 or more runs since the 2022 season — 5th best in MLB; League Avg: .792.

The Mariners are 83-27 (.755) when they’ve hit 2 or more home runs since the 2022 season — tied for 5th best in MLB; League Avg: .697.

Reds hitters had a swing rate of just 45% in the 2023 season — 2nd lowest in MLB; League Avg: 48%.

The Reds have a winning percentage of just 44% at home since the 2022 season — 4th lowest in MLB; League Avg: 53%.

The Reds have won just 63% of games in which they have scored in at least three different innings since the 2022 season — 3rd lowest in MLB; League Avg: 73%.

The Reds are just 48-38 (.558) when they’ve hit 2 or more home runs since the 2022 season — lowest in MLB; League Avg: .697.

The Mariners batted just .125 on pitches out of the zone in the 2023 season — 2nd lowest in MLB; League Avg: .151.

Mariners hitters struck out 1,181 times in 4,577 PA’s (26%) against RHP in the 2023 season — 2nd highest in MLB; League Avg: 23%.

Mariners hitters put just 33% of their swings in play against LHP in the 2023 season — lowest in MLB; League Avg: 37%.

Mariners hitters pulled 50% of balls they’ve put into play against RHP in the 2023 season — highest in MLB; League Avg: 47%.

Opponents had a groundball rate of just 40% against Reds pitchers in the 2023 season — 2nd lowest in MLB; League Avg: 43%.

Reds pitchers won 46% of games in which they allowed their opponent to score in three different innings on the road in the 2023 season — 2nd highest in MLB; League Avg: 27%.

Reds pitchers walked 613 of 6,310 batters (10%) in the 2023 season — tied for 4th highest in MLB; League Avg: 9%.

Reds pitchers walked 140 of 1,443 batters (10%) when facing the leadoff batter in the inning in the 2023 season — 4th highest in MLB; League Avg: 8%.

Mariners pitchers walked 421 of 6,006 batters (7%) in the 2023 season — 2nd best in MLB; League Avg: 9%.

Mariners pitchers walked 97 of 1,455 batters (7%) when facing the leadoff batter in the inning in the 2023 season — 3rd best in MLB; League Avg: 8%.

Mariners pitchers had a strikeout rate of 27% in late innings in the 2023 season — best in MLB; League Avg: 24%.

Mariners pitchers allowed innings of 3+ runs in 5% of innings played in the 2023 season — lowest in MLB; League Avg: 6%.

Mariners vs. Reds Injuries Tonight That May Affect Prop Bets 

  • Mitch Haniger (Seattle Mariners): Back, Out
  • Gregory Santos (Seattle Mariners): Lat, Out
  • Eduard Bazardo (Seattle Mariners): Undisclosed, Out
  • Matt Brash (Seattle Mariners): Arm, Out
  • Sam Moll (Cincinnati Reds): Shoulder, Day-To-Day
  • Noelvi Marte (Cincinnati Reds): Hamstring, Out
  • Jonathan India (Cincinnati Reds): Foot, Day-To-Day
  • Matt McLain (Cincinnati Reds): Oblique, Out
  • Nick Lodolo (Cincinnati Reds): Lower Leg, Day-To-Day
  • Reiver Sanmartin (Cincinnati Reds): Elbow, Out
  • Alex Young (Cincinnati Reds): Back, Day-To-Day
  • Emilio Pagan (Cincinnati Reds): Abdomen, Out
  • Connor Overton (Cincinnati Reds): Elbow, Out

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Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.

Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.