If this winds up being a harmless depth flier, fine. Catcher depth matters, and Seattle doesn’t currently have a second catcher on the 40-man after Mitch Garver hit free agency and Harry Ford got shipped out for lefty reliever Jose A. Ferrer. A warm body in camp is better than pretending Cal Raleigh can catch 162 games and simply “vibe” his way through the wear-and-tear.
Mariners’ latest catcher rumor raises one uncomfortable question behind Cal Raleigh
If Knizner is the plan behind Raleigh, then the Mariners are basically telling you they’re comfortable playing offense on hard mode the second Cal takes a day off.
Knizner’s résumé is basically a warning label. He hit .221/.299/.299 with one homer in 88 plate appearances for the Giants in 2025, and his career line sits at .211/.281/.316 in just under 1,000 MLB plate appearances. Offensively, that’s not “backup catcher who can hold it down.” That’s “please don’t let Cal take a foul tip off the mask in April.”
In a defensive sense, this isn’t the kind of guy who’s going to carry the glove in order to make up for the bat. The past year or so, he’s had some average grades for his framing, but the blocking hasn’t really been that good, and I would say he’s got a middle-of-the-road arm. He’s thrown out just 16.4 percent of base runners over the last 4 seasons.
Here is the other part: if it’s a big-league deal, Knizner has enough service time that he can’t just be stashed in Tacoma without his consent. Thus, you are not purchasing a flexible depth piece; you are purchasing a roster position.
Knizner was an actual prospect (No. 3 in the Cardinals’ system in 2019) but that was six years ago. Unless you’re in a really comfortable division lead in August, “former prospect” catching a bullpen game is not the kind of problem you want to be testing in real time.
If Seattle is serious about keeping Raleigh fresh and keeping the offense afloat when he sits, this can’t be the only move. Even if a Garver reunion isn’t thrilling, the Mariners are open to it — and at least that version looks like a real MLB backup plan. Because if you hated trading Harry Ford, watching Knizner become the No. 2 is going to feel like rubbing salt directly into the wound.
From a pure value standpoint, it’s hard to hate the Harry Ford-for-Jose A. Ferrer stunner. The Seattle Mariners turned a prospect with an uncertain defensive future into a hard-throwing lefty who fits their bullpen identity almost a little too perfectly. That’s the kind of “prioritize the present” move a win-now team is supposed to make.
But in solving one problem, the Mariners quietly created another: they completely nuked their catching depth chart.
Right now, the 40-man roster has exactly one catcher: Cal Raleigh. That’s it. No safety net, no soft landing, no “break glass in case of Tuesday getaway game.” Just Big Dumper and a whole lot of vibes.
Mariners solved one problem with the Harry Ford trade while creating another
Could they start Luke Stevenson’s clock? Sure. Would it be malpractice? Absolutely. Scouts love the kid, and the long-term upside is real, but nothing about this front office screams “burn service time on a 21-year-old catcher just to avoid a one-year deal.”
Which means the Mariners deliberately walked themselves back into a market they didn’t have to shop in: backup catcher.
That’s where the money part gets uncomfortable. Before the Josh Naylor deal, estimates had Seattle’s offseason budget in the $30–35 million range. Add Naylor’s 2026 salary at $11.3 million, then tack on, say, $5 million for a Mitch Garver reunion or a similar replacement-level option, and you’ve just shaved a real chunk off the top for a position that was already covered in-house.
Now ask yourself: can they still squeeze in Naylor, a backup catcher, and Jorge Polanco, who’s projected to land a deal pushing $15 million a year?
Maybe. But if Polanco’s market keeps humming, it’s easy to see how this gets tight fast. Buster Olney of ESPN has already described Polanco as “coveted,” which is code for: hope you’re ready to overpay or pivot.
However, back to Garver. No disrespect, he’s had a solid career and did grind through a brutal 2025. But the amount of nausea his name produced in a Mariners lineup graphic last season could probably power the Space Needle. Sure, he’s a clear upgrade over Seby Zavala. No, that doesn’t change the fact that this catching room suddenly feels like a house of cards behind an all-world starter.
Nobody’s pretending Ford was guaranteed to turn into Freddy Fermin 2.0. But if he’d struggled in 2026, fans would’ve given a long leash to a 22-year-old with upside and years of control. That patience vanishes the second you swap “future cornerstone” for “veteran who’s supposed to hit.”
The Mariners absolutely might come out of this fine. Ferrer could shove, Polanco could still land in Seattle, and a sensible backup catcher could slide in without blowing up the budget. But make no mistake: by trading Ford, they turned a quiet organizational strength into a potential headache — and now they have to thread a much tighter needle to finish this roster.
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