Mariners vs. Athletics Dunkel MLB Picks, Predictions and Prop Bets - April 20

The Seattle Mariners host the Athletics to start a three-game series at T-Mobile Park, with first pitch at 9:40 p.m. ET on Monday. Emerson Hancock (2-1, 2.28 ERA) will start for the Mariners, who are 10-13 this season and fourth in the AL West. J.T. Ginn (0-0, 3.31 ERA) is starting for the Athletics, who are 11-11 and first in the AL West.

Oddsmakers have made the Mariners a decent moneyline favorite (-144) at home over the Athletics (+122). The game's total is 8.

Mariners vs. Athletics Odds, Game Time

• Game day: Monday, April 20, 2026
• Game time: 9:40 p.m. ET
• Location: Seattle, Washington
• Stadium: T-Mobile Park
• Favorite: Mariners (-144)
• Underdog: Athletics (+122)
• Over/under: 8

How to Watch Mariners vs. Athletics

• TV Channel: SEAM and NBCS-CA
• Live Stream: Fubo (Watch for free)

Bet now on FanDuel Sportsbook!

Mariners vs. Athletics: Betting the Moneyline

• The Mariners have compiled a 9-10 record in games they were listed as the moneyline favorite (winning 47.4% of those games).
• The Athletics have won in nine, or 52.9%, of the 17 contests they have been named as odds-on underdogs in this year.
• This season, the Mariners have won five of their nine games, or 55.6%, when favored by at least -144 on the moneyline.
• This season, the Athletics have come away with a win five times in 10 chances when named as an underdog of at least +122 or worse on the moneyline.
• Based on this contest's moneyline, the Mariners have an implied win probability of 59%.
• The moneyline set for this matchup implies the Athletics have a 45% chance of coming away with a victory in the contest.

Mariners vs. Athletics: Betting the Spread & Total

• The Mariners have played in 23 games with a set over/under, and have combined with their opponents to go over the total 10 times (10-13-0).
• The Athletics and their opponents have hit the over in 11 of their 22 games with a total this season.
• The Mariners are 9-14-0 against the spread this season.
• The Athletics are 12-10-0 against the spread in their 22 games with a line set by sportsbooks this season.