Guardians vs Mariners: How to Make Money Betting This Late-Night MLB Play

In Friday night’s showdown at T-Mobile Park, the Seattle Mariners host the Cleveland Guardians in Game 2 of their series with George Kirby on the mound against Gavin Williams. After dropping the opener 6-4 on Thursday, the Mariners are hungry to strike back—and the first-five run line is the perfect spot to cash in. Kirby’s pinpoint command and elite strike-throwing will keep the Guardians’ offense quiet through five innings, while Williams is primed to get shelled by a Mariners lineup motivated after last night’s loss.

Kirby enters this start as one of baseball’s most efficient right-handers. The veteran has consistently posted sub-3.40 xFIPs over the past two seasons by living in the zone and inducing weak contact with his four-seamer and slider combo. Against a Guardians lineup that relies on contact and small-ball, Kirby excels at limiting hard contact in the early going. He’ll neutralize leadoff man Steven Kwan’s speed game and keep power threats like Kyle Manzardo and Chase DeLauter (who went deep twice in his MLB debut Thursday) in check by pounding the strike zone and working ahead. Expect Kirby to cruise through five frames allowing two runs or fewer while the Mariners’ bullpen stays fresh. His ability to generate ground balls and weak pop-ups plays perfectly against Cleveland’s patient but contact-oriented approach early in games.

On the flip side, Gavin Williams is due for a rough outing. The Guardians righty rode some serious BABIP luck in the second half of 2025, posting a sparkling 2.18 ERA that masked underlying command problems and a 4.39 FIP. His walk rate remains well above average, and that lack of control gets exposed against lineups that can capitalize on mistakes. After Thursday’s loss, the Mariners are locked in and ready to pounce. Julio Rodríguez is coming off a strong spring and will set the tone from the three-hole. Cal Raleigh provides switch-hitting thump in the cleanup spot, while newcomers Josh Naylor and Brendan Donovan add proven contact and extra-base pop. Randy Arozarena rounds out a dangerous top-six that feasted on mistakes last season. Williams’ tendency to elevate his fastball and leave breaking balls over the plate gives this group plenty to feast on in the first five innings.

Kirby has dominated first-five situations throughout his career, and the Mariners’ offense ranks among the league’s best at punishing righties who struggle with command. Cleveland’s attack looked opportunistic Thursday but lacks the sustained pressure to hang with Kirby when he’s on. This projects as a low-scoring, half-speed early game where Seattle grabs a lead and never looks back.

Take the Mariners F5 -0.5 with me tonight. Kirby limits the Guardians’ offense, Williams gets rocked by a motivated Mariners squad, and Seattle walks away with the first-five victory in what should be a no-sweat F5 play.