After the Mariners declined their end of Mitch Garver’s $12MM mutual option last fall, Garver took his $1MM buyout and then sat through a “super slow offseason. Never really got any good offers or formal offers,” as the catcher told the Seattle Times’ Adam Jude. Garver’s long wait in free agency ended two days ago when he re-signed with the M’s on a minor league deal, and Garver credited his fellow backstop Cal Raleigh with helping get the ball rolling on the reunion.
Earlier this week, Garver said “Cal reached out and said, ’Maybe you should try calling the Mariners.’ So we called Justin [Hollander, the Mariners’ GM]. Within 24 hours, we were able to work something out.” Reports from December indicated that Seattle had some interest in bringing Garver back, and though Andrew Knizner was signed to a one-year, $1MM guaranteed deal, Garver’s return gives the M’s some more depth behind the plate.
Raleigh made 38 starts at DH last season, as the Mariners wanted to give the slugger a break from catching duties while still keeping his power bat in the lineup. Since a fresh and productive Raleigh is critical to Seattle’s hopes, the team figures to use this same tactic again in 2026, opening the door for plenty of time for a backup catcher. It perhaps isn’t out of the question that both Garver and Knizner are on the 26-man roster, though the M’s are probably more likely to stick with Raleigh and one backup as the catching corps.
Elsewhere at the Mariners’ camp, Adam Divish of the Seattle Times writes that infield prospect Michael Arroyo will get some looks as a third baseman and left fielder once Arroyo returns from national team duty with Colombia during the World Baseball Classic. Arroyo has never played in the outfield as a pro, and played in a handful of games at the hot corner when playing with the Mariners’ Dominican Summer League team in 2022. Otherwise, Arroyo has played exclusively as a middle infielder, and was only a second baseman and DH in the minors in 2025.
Heading into 2026, Baseball Prospectus ranks Arroyo as the 36th-best minor leaguer in the sport, and The Athletic’s Keith Law (49th), ESPN’s Kiley McDaniel (62nd), and MLB Pipeline (67th) all have Arroyo within their preseason top-100 rankings. The consensus on Arroyo’s defense is that he could end up as a decent big league second baseman, though between offseason acquisition Brendan Donovan and a bunch of other infield prospects, it makes sense that the Mariners would want to expand Arroyo’s versatility.
2027 is probably the likeliest date for Arroyo’s Major League debut. He just turned 21 last November, and had a modest .255/.376/.341 slash line over 250 PA with Double-A Arkansas in 2025. Arroyo’s approach at the plate is well-regarded by scouts, but he’ll need some bigger numbers in the minors (and probably an injury or two ahead of him on the depth chart) to get himself on the radar for a big league call-up this year.
In a longer piece from Ryan Divish, Bryce Miller reported good health and a normal offseason routine in the wake of an injury-plagued 2025 season. Miller was limited to 18 starts and 90 1/3 innings in 2025 due to a pair of stints on the injured list, as Miller battled bone spurs in his throwing elbow. Rather than a surgical option, Miller received a cortisone shot and a PRP shot to help his recovery, and he finished his tough year on the high note of a 2.51 ERA over three starts and 14 1/3 innings during Seattle’s postseason run.
Following the season, Miller said he got a Synvisc injection, which is “like a gel, like a joint lubricant.” This allowed him to proceed as normal this winter, and he may be able to avoid surgery altogether.
“[Dr. Keith] Meister was like, ’Don’t touch it [Miller’s elbow]. If it feels good, don’t touch it’,” Miller said. ” ’Now that we know kind of how to help it, if you feel anything in the offseason or anything in Spring Training or anything during the year, just get another injection, to get back rolling again now that we know how to fix it.’ He advised against doing anything until I feel something and I haven’t felt anything.”
Miller is already up to 98mph in his live batting-practice sessions, and he has added 15 pounds of muscle over the offseason. Now entering his fourth MLB season, Miller looked like a breakout star when he had a 2.94 ERA over 180 1/3 innings with the Mariners in 2024, before his bone spurs hampered his progress last year.
