The Miami Marlins and Seattle Mariners meet Sunday afternoon at T-Mobile Park to wrap up their three-game interleague series, with Seattle aiming to complete a sweep and Miami fighting to salvage a win before heading back east. The Mariners, carrying strong momentum into this matchup, have leveraged a balanced attack of timely hitting, aggressive baserunning, and dominant bullpen work to position themselves comfortably in the AL West standings, while the Marlins have struggled to find consistency across both sides of the ball, reflected in their 12–11 ATS record and a growing list of missed opportunities. Seattle will hand the ball to Bryce Miller, who, despite a 1–3 record and a 4.21 ERA, has shown encouraging signs in his recent starts, improving his command and effectiveness with his fastball-slider combination, which could play well against a Miami lineup that has had trouble capitalizing with runners on base. On the offensive side, the Mariners are led by Jorge Polanco, who boasts a scorching .351 batting average and a .596 slugging percentage, making him one of the more dangerous hitters in the lineup, consistently sparking rallies and driving in critical runs. Behind him, contributions from Julio Rodríguez and Cal Raleigh have bolstered a lineup that has learned to thrive in close, low-scoring games, a crucial advantage in the expansive dimensions of T-Mobile Park.

Meanwhile, the Marlins counter with promising young right-hander Max Meyer, who enters the contest with a 2–2 record and an outstanding 2.10 ERA, displaying advanced pitchability and poise beyond his years, providing Miami with a legitimate chance to keep the game close if he can navigate through Seattle’s patient lineup. Miami’s offense, however, has been inconsistent, relying on Eric Wagaman’s .274 average and Xavier Edwards’ .283 clip to generate base traffic, but lacking the timely hits needed to string together big innings, often leaving them vulnerable late in games when the margin for error shrinks. Defensively, the Marlins have been average at best, occasionally compounding offensive struggles with costly errors, while the Mariners have played clean, fundamentally sound baseball behind a pitching staff that has steadily rounded into form. Betting trends suggest a tight contest: while Seattle has covered the run line in six of their last ten games at home, head-to-head history between these two teams has favored the underdog covering the spread in four of the last five meetings, indicating that Miami may keep this game competitive longer than expected. Key to Sunday’s game will be whether Miami can finally capitalize on its baserunners early and avoid falling behind, forcing Seattle into a tighter contest where small ball and bullpen management take center stage. For the Mariners, scoring early off Meyer and handing a lead to a lights-out bullpen led by Andrés Muñoz, who has yet to allow a run over 13 innings, would be the ideal path to securing the sweep. With both teams looking to set the tone heading into May, expect a competitive, tightly played game where execution in key moments likely determines the victor.