Mariners Add Andrew Knizner for Catching Depth

The Seattle Mariners continue to shape their roster for the 2026 season with a focus on depth and experience. On Tuesday, the team announced the signing of catcher Andrew Knizner to a one-year MLB contract, adding a seasoned presence behind the plate.

Knizner, 30, spent the first five years of his career with the St. Louis Cardinals (2019–2023) before short stints with the Texas Rangers in 2024 and San Francisco Giants in 2025. While his offensive contributions have been limited—a career .221/.281/.316 slash line with 19 home runs—his experience handling pitching staffs makes him a valuable addition.

The signing bolsters Seattle’s catching depth following the offseason trade of top prospect Harry Ford to the Washington Nationals. With Mitch Garver, the team’s previous backup catcher, remaining a free agent, Knizner is expected to serve as a reliable complement to starter Cal Raleigh.

As the Mariners prepare for a potential playoff run, adding a veteran presence behind the plate addresses a critical positional need. The move also reflects the organization’s broader strategy of balancing young talent with experienced players to maintain roster stability.

1. Knizner’s Role in Seattle

Knizner is projected to serve primarily as a backup to Cal Raleigh, offering consistency and guidance to a pitching staff that remains one of Seattle’s strengths. His experience across multiple MLB organizations gives him insight into managing game situations and pitcher tendencies. Despite modest offensive output over his career, Knizner brings defensive reliability and knowledge, which can help maintain stability during the long season. Manager Scott Servais can deploy him strategically in games that require a veteran presence behind the plate. Seattle’s catching depth was impacted by the offseason trade of Harry Ford, who might have been a potential in-house replacement for Garver. With Ford gone, Knizner fills a necessary gap and ensures the team isn’t overly reliant on rookie or inexperienced players. This one-year deal provides the Mariners with flexibility while giving Knizner an opportunity to showcase his skills and contribute to a team aiming for postseason contention.

2. Catching Challenges and Opportunities

The Mariners’ catching situation has undergone significant changes since 2025. Mitch Garver, the previous backup, remains unsigned, leaving the team with limited alternatives aside from Raleigh and Knizner. The front office moved decisively to address this by signing a veteran capable of mentoring pitchers and stabilizing the position. Knizner’s track record emphasizes game management over offensive production. His ability to call a game, frame pitches, and work with a variety of pitchers can help maintain Seattle’s pitching staff effectiveness, particularly in high-leverage situations. Cal Raleigh, the team’s starting catcher, benefits from having a reliable backup who can step in without disrupting rhythm or chemistry. Knizner’s presence allows Raleigh occasional rest without compromising defensive performance. The signing also highlights the Mariners’ broader strategy of supplementing their roster with experienced players to guide young stars and maintain competitiveness in a tight American League West.

3. Mariners’ Path Forward

While the Mariners’ pitching depth is a clear strength, improving the lineup around core players such as Cal Raleigh, Julio Rodriguez, and Josh Naylor remains a priority. Knizner’s signing is a small but important step toward stabilizing the roster. Adding a veteran catcher allows the team to focus resources elsewhere, such as bolstering the bullpen or supplementing the offense. Strategic acquisitions in these areas could be the difference in a competitive playoff push. Seattle enters the offseason with potential for postseason contention but recognizes the need for incremental improvements. Balancing veteran presence with young talent will be key to sustaining success throughout the 162-game season. Ultimately, the Knizner signing represents a practical, low-risk move designed to provide stability, mentoring, and flexibility behind the plate while keeping Seattle’s playoff hopes intact.