St. Louis Cardinals at Seattle Mariners odds, picks and predictions

Analyzing Sunday’s St. Louis Cardinals at Seattle Mariners odds and lines, with MLB expert picks, predictions and best bets.

The St. Louis Cardinals (8-13) and Seattle Mariners (10-11) meet Sunday to wrap-up their 3-game series. First pitch from T-Mobile Park is set for 4:10 p.m. ET. Let’s analyze BetMGM Sportsbook’s lines around the Cardinals vs. Mariners odds and make our expert MLB picks and predictions for the best bets.

Season series: Mariners lead 2-0

St. Louis lost 5-4 on Saturday after losing 5-2 in the opener and the Cardinals have now lost 2 straight series. Once again the Cardinals got off to an early lead, up 3-1 in the 3rd, but a 2-run HR from Mariners RF Teoscar Hernandez tied it up in the 6th, and Seattle scored twice more in the 7th.

The Mariners have now won back-to-back games after dropping 3 straight to the Milwaukee Brewers. Seattle is looking to get to a .500 record both at  home and overall while simultaneously sweeping the Cardinals.

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Cardinals at Mariners projected starters

RHP Jack Flaherty vs. RHP Chris Flexen

Flaherty (1-2, 2.95 ERA) makes his 5th start. He has a 1.41 WHIP, 7.2 BB/9 and 7.2 K/9 in 21 1/3 IP.

  • Last start vs. Seattle was July 2, 2019: 4 2/3 IP, 7 H, 4 ER, 4 BB, 7 K in a no-decision loss
  • Was 1-0 in 4 road appearances (3 starts) last year: 4.80 ERA, 15 IP, 15 H, 8 ER, 13 BB, 11 K

Flexen (0-3, 7.79 ERA) makes his 4th start. He has a 1.73 WHIP, 4.2 BB/9 and 5.7 K/9 in 17 1/3 IP.

  • Last start vs. St. Louis was April 20, 2019, as a member of the New York Mets: 4 1/3 IP, 7 H, 5 ER, 4 BB, 0 K, and a loss
  • Was 5-4 in 10 home starts last year (14 appearances); 61 1/3 IP, 64 H, 31 ER, 16 BB, 47 K

Cardinals at Mariners odds

Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 8:24 a.m. ET.

  • Moneyline (ML): Cardinals -110 (bet $110 to win $100) | Mariners -110 (bet $110 to win $100)
  • Run line (RL)/Against the spread (ATS): Cardinals -1.5 (+145) | Mariners -1.5 (-175)
  • Over/Under (O/U): 8.5 (O: -115 | U: -105)

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Cardinals at Mariners picks and predictions

Prediction

Cardinals 8, Mariners 3

Moneyline

BET CARDINALS (-110).

The Cardinals, despite dropping multiple series, have only been swept once.  In every series except vs. Atlanta they have been able to win at least 1 game, even after going down 2-0. The Cardinals will continue that streak as they have proven they can get the lead on Seattle, but haven’t yet been able to capitalize on it.

Run line/Against the spread

BET CARDINALS -1.5 (+145)

Only 1 of the Cardinals 8 wins has been by 1 run, the rest have been 2-plus run victories. If you expect the Cardinals to win this game then expect for them to cover the run line as well, as that is what they have done in wins all season.

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Over/Under

LEAN OVER 8.5 (-115).

The Over is 4-0 in the Cardinals last 4 games following a loss and 5-0 in their last 5 when the opponent scored 5+ runs in their last game. For Seattle the Over is 7-0 in Flexen’s last 7 interleague starts.

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For more sports betting picks and tips, check out SportsbookWire.com and BetFTW.

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St. Louis Cardinals at Seattle Mariners odds, picks and predictions

Analyzing Saturday’s St. Louis Cardinals at Seattle Mariners odds and lines, with MLB expert picks, predictions and best bets.

The St. Louis Cardinals (8-12) and Seattle Mariners (9-11) meet Saturday for game 2 of a 3-game series. First pitch from T-Mobile Park is set for 9:40 p.m. ET. Let’s analyze BetMGM Sportsbook’s lines around the Cardinals vs. Mariners odds and make our expert MLB picks and predictions for the best bets.

Season series: Seattle leads 1-0

St. Louis lost 5-2 in the series opener Friday despite jumping out to a 2-0 lead in the 2nd inning thanks to a OF Jordan Walker double that scored 2. LHP Steven Matz moved to 0-3 on the season after allowing 4 ER in 5 1/3 IP.

The victory snapped a 3-game losing skid for the Mariners. OF Teoscar Hernandez had a big game, scoring 3 runs, including a solo home run in the 4th inning that tied the game up for Seattle. DH AJ Pollock and OF Jarred Kelenic each contributed 2 RBIs.

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Cardinals at Mariners projected starters

RHP Miles Mikolas vs. RHP Luis Castillo

Mikolas (0-1, 8.10 ERA) makes his 5th start. He has a 2.05 WHIP, 2.3 BB/9 and 8.6 K/9 through 20 IP.

  • Went 6-10 with a 4.10 ERA and 1.21 WHIP with 49 ER on 106 H and 24 BB with 84 K across 107 2/3 IP in 18 starts and 1 relief appearance on the road last season
  • Hasn’t faced the Mariners since 2014 as a member of the Texas Rangers

Castillo (2-0, 0.73 ERA) makes his 5th start. He has a 0.61 WHIP, 1.5 BB/9 and 9.5 K/9 through 24 2/3 IP.

  • Went 4-1 in 12 home starts last year. He had a 2.69 ERA and 0.98 WHIP with 80 strikeouts, allowing 22 earned runs on 52 hits and 20 walks
  • Allowed 4 earned runs on 8 hits and 1 walk with 5 strikeouts in a 6-4 no-decision loss in his last appearance vs. St. Louis on Sept. 11, 2021, as a member of the Cincinnati Reds

Cardinals at Mariners odds

Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 11:12 a.m. ET.

  • Moneyline (ML): Cardinals +135 (bet $100 to win $135) | Mariners -160 (bet $160 to win $100)
  • Run line (RL)/Against the spread (ATS): Cardinals +1.5 (-155) | Mariners -1.5 (+125)
  • Over/Under (O/U): 7.5 (O: -120 | U: +100)

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Cardinals at Mariners picks and predictions

Prediction

Mariners 3, Cardinals 2

Moneyline

BET MARINERS (-160).

These teams are so evenly matched and rarely face each other, but the Mariners have a clear advantage with Castillo starting. Mikolas has not looked like himself to start the season for the Cardinals and Castillo has looked like one of the top pitchers in baseball. The Mariners are also 4-0 in their last 4 interleague games vs. teams with a losing record.

Run line/Against the spread

LEAN CARDINALS +1.5 (-155).

The pitching for Seattle will make it hard for St. Louis to win, especially with their lackluster bullpen, but the talent of the Cardinals should be enough to make this game close.

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Over/Under

BET UNDER 7.5 (+100).

The Under is 3-0-1 in St. Louis’ last 4 Saturday games and 5-0 in their last 5 games after scoring 2 runs or fewer in their previous game.

The Under is 8-0 in Castillo’s last 8 starts coming off 5 or more days of rest.

The Under is also 3-0-1 in the last 4 meetings between these squads.

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For more sports betting picks and tips, check out SportsbookWire.com and BetFTW.

Follow @payton_shanks on Twitter. Follow SportsbookWire on Twitter and like us on Facebook.

Additional MLB coverage:
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St. Louis Cardinals at Seattle Mariners odds, picks and predictions

Analyzing Friday’s St. Louis Cardinals at Seattle Mariners odds and lines, with MLB expert picks, predictions and best bets.

The St. Louis Cardinals (8-11) and Seattle Mariners (8-11) meet Friday for the opening game of a 3-game series. First pitch from T-Mobile Park is set for 10:10 p.m. ET. Let’s analyze BetMGM Sportsbook’s lines around the Cardinals vs. Mariners odds and make our expert MLB picks and predictions for the best bets.

Season series: First meeting since 2019 season when Cardinals won 2 of 3 games; St. Louis leads all-time series 11-7

St. Louis won 14-5 as -201 home favorites Wednesday vs. the Arizona Diamondbacks after dropping the 1st 2 games of the series. The Cardinals only went 3-4 during their 7-game homestand, but are a hot-hitting team. St. Louis ranks 4th in batting average (.274) and 3rd in hits (181).

Seattle is 3-3 on their current 9-game homestand. They lost 5-3 as -131 home favorites vs. the Milwaukee Brewers Wednesday. After sweeping Colorado at home they were swept by the Brewers.

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Cardinals at Mariners projected starters

LHP Steven Matz vs. RHP George Kirby

Matz (0-2, 6.48 ERA) makes his 4th start. He has a 1.80 WHIP, 4.3 BB/9 and 9.2 K/9 in 16 2/3 IP.

  •  Last start vs. Seattle was Aug. 15, 2021, as a member of the  Toronto Blue Jays; 5 IP, 3 H, 0 ER, 3 BB, 4 K and a win
  • In 9 road appearances (6 starts) last season: 26 IP, 23 H, 13 ER, 7 BB, 30 K

Kirby (1-1, 3.78 ERA) makes his 4th start. He has a 1.26 WHIP, 0.5 BB/9 and 6.5 K/9 in 16 2/3 IP.

  • First time pitching against St. Louis
  • Was 3-3 in 13 home starts last season; 71 1/3 IP, 77 H, 26 ER, 10 BB, 77 K

Cardinals at Mariners odds

Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 10:38 a.m. ET.

  • Moneyline (ML): Cardinals +110 (bet $100 to win $110) | Mariners -135 (bet $135 to win $100)
  • Run line (RL)/Against the spread (ATS): Cardinals +1.5 (-185) | Mariners -1.5 (+150)
  • Over/Under (O/U): 8 (O: -110 | U: -110)

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Cardinals at Mariners picks and predictions

Prediction

Mariners 4, Cardinals 2

Moneyline

LEAN MARINERS (-135).

The Mariners are only 5-8 at home this season which is why I am more confident in the O/U bet than this one. The Cardinals are a very solid team  and have the potential to put up 8+ runs any given night. The Mariners are still the safer lean here because the Cardinals inconsistency on pitching and on defense is what is hurting them.

Run line/Against the spread

AVOID. 

The risk at Cardinals +1.5 (-185) is not worth the potential payout here. The Cardinals are a decent road team (3-3), but don’t often play in close games. They are 1-2 in 1-run games this year and while they very well could make this a close game, or even win, this bet is not a safe one.

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Over/Under

BET UNDER 8 (-110).

For St. Louis the Under is 3-0-1 in Matz’s last 4 starts on grass and for Seattle the Under is 4-0 in their last 4 interleague home games vs. a left-handed starter.

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For more sports betting picks and tips, check out SportsbookWire.com and BetFTW.

Follow @payton_shanks on Twitter. Follow SportsbookWire on Twitter and like us on Facebook.

Additional MLB coverage:
BaseballHQ Fantasy Baseball
BaseballPress.com: Your source for every MLB lineup

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