The Seattle Mariners are entering spring training with a clear roster approach, particularly in the infield. Jorge Polanco is set to return as the starting third baseman, signed to a one-year contract. Meanwhile, Donovan Solano has been added to share first base duties with Luke Raley. The competition for second base is heating up, primarily between Dylan Moore, Ryan Bliss, Leo Rivas, and Cole Young, with Moore positioned as the frontrunner.

One noteworthy player making a strong impression in spring training is Ben Williamson. Hitting .429 with three RBIs, Williamson’s outstanding offensive performance paired with solid defensive skills is making him a candidate for the opening day roster. Mariners' management remains open to the possibility of prospects earning a major league spot, especially if Polanco’s recovery from knee surgery hampers his return.

Williamson's rise could complicate decisions for manager Dan Wilson, particularly concerning depth at third base. His previous season's stats show promise, though concerns about his power remain. Still, with Mariners’ hitting strategy focusing on contact and situational hitting, Williamson fits well into their plans. If he continues to excel, he may just secure his place in Seattle's 26-man roster come opening day.

Seattle Mariners general manager Justin Hollander shared insights into the team's second base strategy for the 2025 season. Dylan Moore is expected to take the lead at second base, with Ryan Bliss and Leo Rivas also in the mix. Cole Young, a notable prospect, could make an impression during spring training, although the team plans to start him at Triple-A Tacoma.

Moore, a versatile player, had a challenging 2023 season with a .201 batting average, but he contributed with his speed, stealing 32 bases. Bliss and Rivas offer intriguing options as they look to establish themselves further in the major leagues. The Mariners are gearing up for spring training soon, aiming to solidify their infield lineup.

Drafting power hitters and pitchers early can leave you lacking in stolen bases, but there are valuable late-round picks with speed potential to consider. Target players like Victor Robles of the Seattle Mariners, who led with a career-high 34 steals and boasts a strong offensive line.

Jacob Young from the Washington Nationals, although lacking power, swiped 33 bags in 2024, while Jose Caballero and Dylan Moore from Tampa Bay and Seattle, respectively, also provide speed with strong defensive metrics. Cedric Mullins of the Baltimore Orioles offers significant upside with his ability to contribute both power and speed.

The Chicago Cubs have officially traded infielder/outfielder Miles Mastrobuoni to the Seattle Mariners following a designation for assignment. The 29-year-old player, who debuted with the Tampa Bay Rays in 2022, has struggled offensively with a lifetime batting average of .219 and a dismal .194 in the previous season with the Cubs.

In Seattle, Mastrobuoni is expected to compete for a spot as the Mariners are looking to strengthen their infield. The team has only made one significant move in free agency by signing Donovan Solano, who will likely share duties at first base and potentially second and third base. Mastrobuoni's left-handed batter profile may complement manager Dan Wilson's strategies.