Monday night’s clash at T-Mobile Park features a battle between two young right-handers off to scorching starts in 2026. While the Seattle Mariners (8-9) hold home-field advantage, the Athletics (8-8) have shown surprising early-season grit, led by an offense that is finally finding its rhythm.
The Pitching Duel
Emerson Hancock (SEA): Hancock has reinvented himself this spring. Entering tonight with a dominant 2.28 ERA and a minuscule 0.76 WHIP, he has ditched his high-velocity reliance for elite command. Through 23.2 innings, he has fanned 25 batters while walking only four. He was nearly untouchable in his last home start against Houston, and his ability to generate “weak contact” fly balls plays perfectly in the vast gaps of T-Mobile Park.+1
J.T. Ginn (ATH): Ginn has been a revelation for the Athletics. While his 3.31 ERA is slightly higher than Hancock’s, his peripheral metrics suggest he is a ground-ball machine. Ginn is inducing grounders at a 50.0% clip, which is the ideal antidote to a Mariners lineup that struggles with power consistency. However, Ginn’s command can be a tightrope walk; he struggled with four walks in his last start against Texas, and the Mariners are notorious for their patient, “zone-first” plate approach.
3 Best Bets for April 20
1. Seattle Mariners Moneyline (-135)
The Mariners are the more complete team in this spot. While Ginn is a ground-ball specialist, Seattle’s lineup is built to grind down starters with high pitch counts. Hancock’s current form is simply too sharp to bet against, especially at home where he has allowed zero earned runs in 11 innings this season. Expect the Mariners’ bullpen—led by a rested Andres Muñoz—to lock down the late innings.
2. Under 7.5 Total Runs (+100)
T-Mobile Park in April is traditionally a “pitcher’s graveyard” for offenses. The air is heavy, and the ball simply does not carry to the power alleys. With two starters boasting sub-3.50 ERAs and a Mariners offense that ranks 24th in home runs, the Under is the smart play. Both Ginn and Hancock are adept at avoiding the “big inning,” and this game has the feel of a 3-1 or 4-2 defensive struggle.
3. Player Prop: Shea Langeliers Over 1.5 Total Bases (+110)
If you’re looking for an offensive outlier, Langeliers is the pick. He is currently hitting .325 with a .993 OPS and has already notched 26 base knocks this season. While Hancock is tough on most righties, Langeliers has shown an elite ability to stay back on Hancock’s slider. At plus-money, betting on the Athletics’ best hitter to find a gap or clear the fence once is high-value ROI.
The “Marine Layer” Factor: Keep an eye on the roof status. If the roof is open, the humidity in Seattle often “kills” fly balls after sunset. If the roof is closed, the ball travels about 5% further, which could slightly favor the Athletics’ power hitters like Langeliers and Soderstrom.
Baseball Best Bets 