Nol Country for Old Men: Diamondbacks Trade for Arenado

The St. Louis Cardinals, or what’s left of them, have traded third baseman Nolan Arenado and money to the Arizona Diamondbacks for right-handed pitcher Jack Martinez.

Arenado was among the best gamers of the 2010s, a three-time Nationwide League house run champ and an elite defensive third baseman. In eight seasons with the Rockies, Arenado made 5 All-Star groups and completed within the prime eight in MVP voting 5 instances. He made the All-Star crew and pulled off the Gold Glove-Silver Slugger double each season from 2015 to 2018.

On the power of these performances, the Rockies signed Arenado to one of many richest contracts in baseball historical past — 9 years, $275 million. After two years, they shipped him to St. Louis, the place the Cardinals lived out the discount of the quarter-billion-dollar extension: A pair nice seasons, adopted by gradual decline and now decrepitude, all earlier than the deal runs out.

The Cardinals have been attempting to ship Arenado off for thus lengthy I truly wrote about his decline 13 months in the past. Arenado averaged a 130 wRC+ and 6.0 WAR per season with the Rockies from 2016 to 2019, then a 131 wRC+ and 5.8 WAR per season in 2021 and 2022, his first two seasons in St. Louis. However after his final nice season in 2022, Arenado began shedding energy, bleeding walks, and shrinking his defensive radius. In 2023 and 2024, he averaged 104 wRC+ and a pair of.9 WAR.

Which continues to be simply positive! When future Corridor of Famers get outdated, they typically flip into solid-but-not-great gamers. Sadly, the subsequent step typically includes going off a cliff, which is what occurred to Arenado in 2025: 84 wRC+, 0.9 WAR in 107 video games.

Congratulations, we’ve found the world’s costliest Jared Triolo.

And but, Arenado is due $27 million this coming season and $15 million in 2027.

That incongruity between wage, manufacturing, and projection is widespread on the again finish of lengthy contracts like Arenado’s. So it’s with nice shock that I supply the next evaluation: I don’t hate this commerce for anybody.

Nicely, I hate this commerce as a result of it effectively and really kills the “Nationwide Arenadics and House Administration” joke I had teed up when Arenado vetoed a commerce to Houston final winter. However that’s a petty, private opinion. The Cardinals and Diamondbacks each did OK right here.

On our participant pages, we’ve a little bit widget up within the prime right-hand nook for information, together with hyperlinks to current FanGraphs articles the place the participant in query has been tagged, in addition to snippets from Rotowire. I consider the perfect summation of Arenado’s state of affairs in St. Louis may be discovered there.

Earlier than the Arenado commerce broke on Tuesday, the newest Rotowire blurb learn: “Cardinals president of baseball operations Chaim Bloom stated Tuesday that releasing Arenado is ‘not an choice,’ Jeff Jones of the Belleville Information-Democrat studies.”

It’s by no means a great signal when a POBO has to reply questions on whether or not he’s going to launch his costliest participant.

And that’s the baseline the Cardinals have been working from: Arenado is declining to alternative degree, and the Cardinals owed him $37 million over the subsequent two seasons it doesn’t matter what. (That’s $42 million, much less the $5 million Colorado was already attributable to pay down.) The query going through Bloom was whether or not Arenado was doing extra hurt than good within the lineup. Once more, not an enviable place.

The Cardinals are paying Arenado’s wage right down to $5 million in 2026 and $6 million in 2027, which implies they’re on the hook for $26 million in useless cash, once more, accounting for what they’re receiving from Colorado. However that’s lower than $37 million. Rather a lot much less.

As an apart, three totally different groups are going to pay Arenado no less than $5 million this coming season, which must be some type of document. Permit me to current the next humorous desk:

The prospect the Cardinals are getting, Jack Martinez, didn’t get a point out in our current Diamondbacks prospect record, which went 56 deep, plus honorable mentions. That’s instructive, however in accordance with Eric Longenhagen, Martinez isn’t nothing. Says Eric:

Martinez spent two years at Trinity College in Texas, one at UL-Lafayette (principally as a reliever) after which his senior 12 months at Arizona State, the place his supply modified; he posted good peripheral stats (most notably a 32.3% strikeout price in 15 begins over 77.1 innings) however a bloated ERA. The Diamondbacks drafted him within the eighth spherical, and signed Martinez for a little bit over $167,000, which is a significant bonus for a senior signal, indicating that Arizona thought he was amongst that demographic’s greatest prospects. He didn’t pitch at an affiliate after the draft.

Martinez’s fastball sits 93 mph with some pure minimize motion and tends to complete on the glove facet of the plate. This pairs properly together with his tailing changeup, which regularly freezes left-handed hitters because it runs again over the within nook. Martinez opens his hips up actually massive on his stride house, and his plant foot lands method towards the primary base facet of the mound. It’s jarring for the hitter at first, and likewise helps create efficient angles together with his heater and cambio. The tweaks ASU made to his supply (Martinez was getting deeper into his legs final 12 months and his arm slot got here down) accentuated this even additional, and his changeup performed like a plus-plus pitch in 2025. However the decrease slot additionally robbed him of some breaking ball depth, and that pitch generated below-average miss and was relegated to strike-getting responsibility. General, Martinez has been a good strike-thrower who undoubtedly belonged in a university rotation, however he’s extra on the reliever/swingman fringe in that regard as a professional prospect.

Martinez was a pleasant senior signal by Arizona and is a positive sleeper professional prospect who has a non-zero probability of being an enormous league starter. He has an actual weapon in that changeup, and has some markers that one would possibly affiliate with late-bloomers: He spent years at small applications and received higher as quickly as he left, he’s made tangible mechanical adjustments, and he did so whereas his position expanded to ASU’s weekend rotation. All this was true earlier than Martinez acquired professional instruction, and that’s thrilling. But additionally, Martinez was an eighth spherical senior signal simply a few months in the past, and his extra probably outcomes are within the swingman/lengthy reduction space until his breaking ball effectiveness or command takes a significant step ahead. That is the form of participant who you would have within the Others of Word part of an inventory as a participant to observe.

You possibly can see a little bit little bit of Martinez right here:

So yeah, this can be a senior signal who’ll be 23 when he makes his skilled debut this spring, however a great prospect inside these extremely restrictive parameters.

Actual discuss: The Cardinals received $11 million in wage reduction and a human man with 4 limbs and a head for a man they have been most likely going to have to chop. Additionally they clear a full-time spot at third base that they’ll use to search out out as soon as and for all if Gorman’s any good. And as commerce rumors proceed to comply with Brendan Donovan like an imaginary pal, the Cardinals’ infield could possibly be much more totally different come Opening Day. Whats up, JJ Wetherholt.

If this commerce is an effective piece of enterprise for St. Louis, doesn’t that logically make it an overpay for the Diamondbacks?

To an extent. The Diamondbacks have, in equity, wanted a 3rd baseman since they traded Eugenio Suárez in July. Jordan Lawlar appeared to have the within observe on that place; Lawlar had been the Diamondbacks’ prime prospect for thus lengthy I believe he was in the identical draft class as Junior Spivey. However a mix of accidents and the emergence of Geraldo Perdomo as a star has saved Lawlar merely on the verge of a daily main league job. And he didn’t assist himself by hitting .182 with 26 strikeouts in 74 massive league plate appearances in 2025.

Possibly Lawlar, for no matter purpose, isn’t the reply. The Diamondbacks are apparently going to offer him a run in heart discipline, one other place of want. Arizona may additionally flip to 2023 first-round decide Tommy Troy, who made it to Triple A final season, however Troy didn’t precisely set the world on hearth there. He most likely isn’t prepared.

Arizona had been linked to Alex Bregman, however that rumor appeared to be predicated on the Diamondbacks buying and selling Ketel Marte, who’ll make $15 million in 2026 and is signed by 2030 with a participant choice for 2031. If he’s on the crew, apparently Arizona wanted to look down a shelf or two for assist at third base.

Because of the Cardinals’ largesse (or desperation, relying on how charitable you wish to be), Arenado is affordable for the primary time in about 10 years. Although once more, it’s honest to marvel how useful he can truly be at this level in his profession.

I believe Arenado’s cooked, but it surely’s honest to bake in some uncertainty in regards to the extent to which he’s cooked. Certainly Arenado’s no extra cooked now than Evan Longoria was when he and the Diamondbacks went to the World Collection in 2023. Bear in mind, the Rockies traded Arenado after a good worse season than this one, in 2020, and he bounced again. And if we wish to slender the pattern to Cardinals nook infielders, no person within the historical past of baseball has ever been extra cooked than late-career Albert Pujols, who signed off with an unlikely 22-dinger, 148 wRC+ season at age 42.

Clearly, Arenado is 5 years older now than he was in 2021, so I’m not saying there’s even a distant probability he rebounds to the extent he was at in 2022. But when he goes again to being a league-average hitter slightly than a mid-80s wRC+ man? He could possibly be OK. And as an alternative of taking part in for a crew that’s going nowhere, he’ll be lining up alongside the perfect middle-infield duo within the league, on a membership that’s received a little bit juice. And in the event you assume — as I do — that Arenado was type of overrated at his peak attributable to taking part in in Colorado, effectively, Arizona has the second-highest elevation of any ballpark within the league.

If Arenado is a 2.0 WAR participant, $5 million is a discount. On the free agent market, $5 million is barely sufficient to purchase you Austin Hedges, who hasn’t hit .200 since 2018. It’s nothing. And with all due respect to Martinez, so is the prospect Arizona gave up. If Martinez turns right into a stud, it’ll be due to some radical transformation he undergoes in St. Louis, not a failure of self-scouting on Arizona’s half. And on the danger of being unsentimental, the most probably consequence is that none of you studying this are ever going to consider this man once more.

The title and the contract concerned right here make this sound like an enormous commerce on the floor, however each Arenado (and his compensation) have been diminished to the purpose the place the on-field impression of this transfer will most likely be insignificant for anybody. The Cardinals saved a couple of dollars, and the Diamondbacks have a low-risk, low-reward shot at extracting the final drops of expertise from a star on the wane. Let’s see if it makes a distinction.