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Athletics vs. Mariners Odds & Betting Predictions - April 21, 2026

Athletics at Mariners

1:40 am • NBCS-CA

Athletics

12-11
6
6 - 4

Seattle Mariners

10-14
4
Starting Pitchers
pitcherteameraw-l
Emerson Hancock logoE.HancockSeattle Mariners logo2.832-1
J.T. Ginn logoJ.GinnAthletics logo3.740-0

Athletics at Mariners Odds

Spread, Total, Moneyline

MatchupOpenSpreadTotalMoneyline
Athletics
12-11
+1.5
+1.5-170
o8-116
+124
Mariners
10-14
u8.5
-1.5+147
u8-106
-149
location pinTuesday 1:40 a.m.
April 21, 2026
T-Mobile ParkSeattle
Athletics vs. Mariners Expert Picks
Player Prop Savant
Player Prop Savant
Last 30d: 107-88-3 (+6.1u)
Over 7.5 (Live)-140
1u
Under 9.5 (Live)-110
1.1u
Sir Lockselot
Sir Lockselot
Last 30d: 20-55-0 (-27.4u)
ATH +124
3.72u
📚Onyx
OldSchool0909
Last 30d: 143-154-0 (+11.9u)
ATH +125
1.25u
Top Shelf Action 🥃
Top Shelf Action 🥃
Last 30d: 277-251-8 (+11.4u)
E.Hancock o5.5 Ks+140
0.41u
#EV Circa +125 BM +122 BO +115
Matt Trollo
Matt Trollo
Last 30d: 41-50-6 (-7.5u)
SEA -135 (F5)
0.5u
(B365) A bit high - Ginn has some difficulty with LHBs, also see notes on F5 for Hancock
Sean Zerillo
Sean Zerillo
Last 30d: 157-148-11 (-5.3u)
Under 8-102
0.51u
Bet to 7.5 (-105)
Wags Wins
Wags Wins
Last 30d: 207-231-2 (-11.6u)
Under 8-102
1.25u
ATH +126
1.26u
Picks Office
Picks Office
Last 30d: 193-179-7 (+1.9u)
ATH +130
1.3u
Join Discord. All picks posted before 8am https://discord.gg/HjKxYKdSUy
Kenny Ducey
Kenny Ducey
Last 30d: 2-4-0 (-2.9u)
Under 8.5-120
1.2u
Grant Neiffer
Grant Neiffer
Last 30d: 23-109-3 (+4.8u)
N.Kurtz o0.5 HR+375
0.94u
S.Langeliers o0.5 HR+433
1.08u
Payoff Pitch Podcast
Payoff Pitch Podcast
Last 30d: 90-128-8 (-3.6u)
ATH +126
0.63u
@Tannerstruth ⭐️⭐️ https://myaction.app/CL26XueLu2b
Ryan Minion
Ryan Minion
Last 30d: 224-296-4 (-16.3u)
Under 0.5 (1st Inn)-115
$1.15
Frank Ammirante
Frank Ammirante
Last 30d: 227-280-13 (-12.1u)
Under 4.5 (F5)-105
1u
Doug Ziefel
Doug Ziefel
Last 30d: 272-366-23 (-22.5u)
E.Hancock u17.5 Outs+100
0.5u
J.Ginn u4.5 Ks-115
0.58u
Matt Trollo
Matt Trollo
Last 30d: 41-50-6 (-7.5u)
Under 8-105
1.05u
Ginn just 6.4 K-BB% this year (17.3% LY), but keeps the ball on the ground (50%) with weak contact (3.06 xERA), Hancock legit improved (2.77 SIERA/2.80 xERA) - most negative run environment, cool temps.

Athletics vs. Mariners Previews & Analysis

  • A's vs Mariners: Kenny's Over/Under Pick for Tonight article feature image

    A's vs Mariners: Kenny's Over/Under Pick for Tonight

    Kenny Ducey•
    Apr 20, 2026 UTC
  • Grant's 5 Home Run Bets for Monday article feature image

    Grant's 5 Home Run Bets for Monday

    Grant Neiffer•
    Apr 20, 2026 UTC
See more MLB Coverage Right Arrow

Prop Odds Comparison

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Line Movement Tracker

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Athletics vs. Mariners Public Betting Percentages

Away Logo

Athletics

Public

Home Logo

Mariners

16%

Bets%

84%

Money%

MLB Public Betting Right Arrow

Betting Trends

  • Mariners are 2-3 in their last 5 games.
  • Mariners are 2-3 in their last 5 games against the spread
  • Mariners are 1-8 in their road games against the spread
  • The totals have gone OVER in 2 of Mariners' last 5 games
  • The totals have gone OVER in 8 of Mariners' 15 last games at home

Matchup History

Against the Spread (ATS) History

overallhomeawayfavoriteunderdog
Mariners		9-158-71-88-131-2
Athletics		13-104-69-41-411-6

Over/Under History

overallhome o/uaway o/ufavorite o/uunderdog o/u
Mariners		10-13-18-6-12-710-10-10-3
Athletics		12-10-19-13-9-15-06-10-1

Straight-Up (ML) History

overallhomeawayfavoriteunderdog
Mariners		10-149-61-89-121-2
Athletics		12-115-57-62-39-8

Last 5 Matchups

dateopponentscorespreadover/undermoneyline
Apr 19thTEXW 5-2-1.5 WU 7.5SEA -140
Apr 18thTEXW 7-3-1.5 WO 7SEA -141
Apr 18thTEXL 0-5-1.5 LU 6.5TEX -131
Apr 17th@SDL 2-5-1.5 LU 8.5SD -122
Apr 16th@SDL 6-7-O 8SD -111

Mariners vs. Athletics Injury Updates

Mariners Injuries

  • Miles Mastrobuoni
    3B

    Mastrobuoni is out with calf

    Out

  • Bryce Miller
    SP

    Miller is out with oblique

    Out

Athletics Injuries

  • Gunnar Hoglund
    SP

    Hoglund is out with back

    Out

See more MLB Injuries Right Arrow
Athletics vs. Mariners Box Score
Athletics Player Stats
Projected
PITCHERPCIPKER
J.T. Ginn logoRJ.Ginn, P925.163
Hogan Harris logoLH.Harris, P251.220
Mark Leiter logoRM.Leiter, P19110
Joel Kuhnel logoRJ.Kuhnel, P10101
HITTERSH-ABRHRRBI
Nick Kurtz logo1N.Kurtz, 1B1-4111
Shea Langeliers logo2S.Langeliers, C1-5111
Carlos Cortes logo3C.Cortes, DH4-5111
Tyler Soderstrom logo4T.Soderstrom, LF2-5100
Jacob Wilson logo5J.Wilson, SS2-4100
Jeff McNeil logo6J.McNeil, 2B1-3100
Max Muncy logo7M.Muncy, 3B0-2001
Lawrence Butler logo8L.Butler, RF2-4002
Zack Gelof logo9Z.Gelof, CF0-4000
Denzel Clarke logo9D.Clarke, CF0-0000
Mariners Player Stats
Projected
PITCHERPCIPKER
Emerson Hancock logoRE.Hancock, P85533
Jose A. Ferrer logoLJ.Ferrer, P19100
Matt Brash logoRM.Brash, P15110
Casey Legumina logoRC.Legumina, P23103
Cooper Criswell logoRC.Criswell, P9100
HITTERSH-ABRHRRBI
J.P. Crawford logo1J.Crawford, SS0-4000
Cal Raleigh logo2C.Raleigh, C1-5111
Julio Rodriguez logo3J.Rodriguez, CF2-4100
Josh Naylor logo4J.Naylor, 1B3-4001
Randy Arozarena logo5R.Arozarena, LF0-4000
Luke Raley logo6L.Raley, DH0-2000
Rob Refsnyder logo6R.Refsnyder, PH0-2000
Rob Refsnyder logo6R.Refsnyder, DH0-2000
Dominic Canzone logo7D.Canzone, RF2-4111
Cole Young logo8C.Young, 2B1-4100
Leo Rivas logo9L.Rivas, 3B1-4001

Athletics vs. Mariners Odds Comparison

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Athletics at Mariners Team Totals

MatchupOverUnder
Athletics
12-11
N/A
N/A
Mariners
10-14
N/A
N/A