Seattle Mariners vs St. Louis Cardinals Picks, Prediction, Odds, and Line Movement for Friday April 24 2026
Use Code WWWC Seattle heads to Busch Stadium on April 24 for an interleague matchup that features a clear starting pitching advantage for the Mariners against a Cardinals team that has struggled to find consistency on both sides of the ball. Bettors working through the night's best MLB picks will find this Mariners vs Cardinals matchup compelling because George Kirby brings a sub-3.00 ERA and elite command profile into a spot against Andre Pallante, whose walk rate has been one of the main reasons St. Louis has given up runs in bunches. With both lineups carrying similar team averages and the pitching comparison so heavily tilted toward Seattle, the Mariners look like the side to trust in what should be a tight, low-scoring game.
Quick Picks and Prediction
- Spread Pick: Mariners -1.5
- Total Pick: Under 7.5
- Projected Final Score: Mariners 4, Cardinals 2
Odds and Line Movement
The market on this matchup has steadily moved in Seattle's favor, with the Mariners opening at -149 and climbing to the current -163 number. St. Louis has been bet from +123 up to +135 as the underdog, reflecting continued support for Seattle's pitching matchup edge. Public money has been overwhelming on St. Louis at 100 percent on multiple ticks, with percentages settling into the 57 to 63 percent range on more recent readings. The total has dropped from 8 down to the current 7.5, and the Under has been backed at 100 percent on the most recent ticks, reinforcing the expectation that Kirby's presence on the mound will suppress scoring.
Opening Odds
| Team | Moneyline | Total |
|---|---|---|
| Seattle | -149 | Over 8 -110 |
| St. Louis | +123 | Under 8 -110 |
Current Odds
| Team | Moneyline | Total |
|---|---|---|
| Seattle | -163 | Over 7½ -118 |
| St. Louis | +135 | Under 7½ -102 |
Line Movement - Run Line
| Date | Time | Seattle | St. Louis |
|---|---|---|---|
| 04/24 | 05:34:06AM | -163 | +135 |
| 04/24 | 04:23:49AM | -156 | +129 |
| 04/23 | 10:39:13PM | -163 | +135 |
| 04/23 | 08:32:57PM | -156 | +129 |
| 04/23 | 06:37:43PM | -163 | +135 |
| 04/23 | 06:37:28PM | -156 | +129 |
| 04/23 | 05:23:59PM | -149 | +123 |
| 04/23 | 04:36:07PM | -156 | +129 |
| 04/23 | 03:57:53PM | -149 | +123 |
Line Movement - Total
| Date | Time | Over | Under |
|---|---|---|---|
| 04/24 | 04:27:51AM | 7½ -118 | 7½ -102 |
| 04/24 | 04:26:05AM | 7½ -119 | 7½ -101 |
| 04/24 | 03:58:19AM | 7½ -118 | 7½ -102 |
| 04/24 | 03:47:03AM | 7½ -119 | 7½ -101 |
| 04/24 | 03:45:34AM | 7½ -118 | 7½ -102 |
| 04/24 | 03:43:03AM | 7½ -119 | 7½ -101 |
| 04/23 | 08:32:57PM | 7½ -118 | 7½ -102 |
| 04/23 | 06:37:43PM | 7½ -116 | 7½ -103 |
| 04/23 | 06:37:28PM | 7½ -119 | 7½ -101 |
| 04/23 | 06:25:29PM | 8 -102 | 8 -118 |
| 04/23 | 04:36:07PM | 8 -108 | 8 -112 |
| 04/23 | 03:57:53PM | 8 -110 | 8 -110 |
Mariners vs Cardinals Key Matchups and Handicap
Mariners
Seattle's case in this game is built around George Kirby, who enters at 3-2 with a 2.97 ERA, a 1.05 WHIP, 33.1 innings pitched, 27 hits allowed, 27 strikeouts, eight walks and four home runs surrendered. Kirby's elite command — just eight walks in 33.1 innings — is exactly the kind of profile that plays well against a St. Louis lineup that hits .229 as a team and has not been stringing together quality at-bats. A 1.05 WHIP means Kirby has been allowing roughly one baserunner per inning, which is precisely the low-traffic profile the Mariners need to carry them in a game where their own offense is not overwhelming. With the largest sample of innings of any pitcher in this matchup, Kirby has also shown durability that gives Seattle the ability to avoid pushing its bullpen too hard.
The Mariners' lineup is not elite, hitting just .226 as a team with a .320 OBP and a .363 slugging percentage, but they have enough pieces to take advantage of Pallante's command issues. Luke Raley leads the club with five home runs, a .292 average and 13 RBI, giving Seattle a legitimate run-producer in the middle of the order. Randy Arozarena has been the club's best on-base bat at .290 with a .385 OBP and a .419 slugging percentage, and that on-base profile is especially valuable against a pitcher who has walked 11 batters in 20 innings. Cal Raleigh rounds out the power profile with five home runs and 14 RBI despite a .198 average, showing that the Mariners can get production from multiple lineup spots even when individual averages are modest.
Get Free $30 Credit for Premium Picks + Exclusive Discounts
Subscribe Now
Cardinals
St. Louis counters with Andre Pallante, who is 2-1 with a 4.05 ERA, a 1.45 WHIP, 20.0 innings pitched, 18 hits allowed, 12 strikeouts, 11 walks and two home runs allowed. The walk total is the major concern in this matchup because Pallante has given up nearly half a walk per inning, and that kind of command problem is exactly what a power-contained Seattle lineup needs to manufacture runs. Against Raley, Arozarena and Raleigh, free passes become extra-base opportunities, and the 1.45 WHIP confirms that Pallante has been working out of traffic all season. If the Mariners can get one or two big innings through those walks, the Cardinals are likely in catch-up mode for much of the game.
The Cardinals do have the single best hitter in this matchup in Jordan Walker, who owns eight home runs, 16 RBI, a .292 average, a .357 OBP and a .607 slugging percentage. Walker is the kind of bat capable of producing a multi-run swing on his own, and Kirby's four home runs allowed in 33.1 innings shows that even an elite strike-thrower has given up some damage this year. Alec Burleson has also been productive with 17 RBI, a .278 average and three home runs, giving St. Louis two bats in the lineup capable of doing real damage. The challenge is that the rest of the Cardinals lineup has not been carrying its weight, and the team's .229 average with a .321 OBP leaves very little room to manufacture runs against a pitcher as stingy as Kirby.
Betting Trends - SEA vs STL
The recent form is essentially a wash, with both teams having won three of their last five games, but St. Louis enters off a 4-1 loss, which points to an offense that has not been producing consistently at home. The biggest trend separator is the team pitching comparison, with Seattle owning a 3.42 ERA and a 1.22 WHIP compared to the Cardinals' 4.77 ERA and 1.43 WHIP. That kind of full-staff gap is significant because it means even if Kirby exits after six innings, the Mariners' bullpen has been more reliable than St. Louis' has been across the season. Public money on the Under has been at 100 percent on the most recent ticks, which aligns with the underlying pitching profile, and the line movement from -149 to -163 reflects consistent sharp support for Seattle.
Key Injuries and Notes - SEA vs STL
Seattle is dealing with a long list of absences, including Victor Robles, Patrick Wisdom, Brendan Donovan, Teddy McGraw and Bryce Miller, which affects outfield, infield and pitching depth. Those absences are not ideal, but none of them fundamentally change the Kirby start or the top of the Mariners' lineup, which is what matters most for this game. St. Louis is missing Matt Pushard, Hunter Dobbins, Lars Nootbaar, Ixan Henderson and Victor Santos, and Nootbaar's absence is especially meaningful for lineup depth because it removes a useful on-base piece at a time when the Cardinals need every run-producing option. The combination of the injury report and the underlying pitching numbers makes it difficult to trust St. Louis to put together enough offense to cover the handicap.
Mariners vs Cardinals ATS and Total Picks
- Against the Spread: Mariners -1.5 is the preferred side play, supported by Kirby's 2.97 ERA and 1.05 WHIP, Pallante's 11 walks in 20 innings creating repeat traffic, and Seattle's 3.42 team ERA giving the Mariners the stronger staff to close out a win.
- Total: Under 7.5 is the play, backed by Kirby's elite command, Seattle's 3.42 team ERA, both teams hitting below .230 as units, and 100 percent public money on the Under on the most recent ticks.
Final Score Prediction
The projected final score is Mariners 4, Cardinals 2. Kirby's elite command and strike-throwing ability should keep St. Louis' inconsistent offense in check, while Seattle takes advantage of Pallante's walks to manufacture just enough offense to build a comfortable lead. Six total projected runs stays well under the 7.5 number, and a two-run Mariners win cashes the -1.5 run line while also covering the moneyline, giving bettors multiple ways to align with the handicap in this Mariners vs Cardinals matchup.
How to Bet Mariners vs Cardinals
For bettors looking to get action on this Mariners vs Cardinals matchup, there are several strong options depending on your state and preferred platform. If legal online sportsbooks are not available in your area or you want a free-to-play alternative, social sportsbooks offer a solid way to get involved with MLB action through promotional coins and daily rewards that fit well on a pitching-matchup-heavy spot like this one. Bettors in legal states looking for competitive run-line pricing and strong Under markets should consider the bet365 bonus code, which pairs well with a game like this where the Mariners moneyline, Mariners -1.5 and Under 7.5 are the featured plays. Another strong option is the fliff promo code, which unlocks bonus coins that can be applied across moneylines, run lines, totals and strikeout props, giving bettors the flexibility to shop Kirby and Walker props alongside the primary sides and totals in this Mariners vs Cardinals matchup.
Never Tried Winners and Whiners? Now Is Your Chance
- Get your first daily picks package for ONLY $1 using coupon code DOLLAR
- If the pick loses, we credit your account with 3 Flex Picks
- If the pick wins, we still give you 1 Flex Pick on the house
- Win or lose, you walk away ahead. One dollar. No catch.
- Check out more MLB predictions
Up To $1500 in Bonus Bets Paid Back if your First Bet Does Not Win
New Users – Bet $5 Get $200 in Bet Reset Tokens for 5 Days
