Joshua Baez’s first taste of the majors gave the Cardinals exactly the kind of glimpse that can keep a front office dreaming.
St. Louis manager Oliver Marmol saw enough to come away talking about Baez’s “super-high ceiling,” and the numbers back up why that phrase sticks.
The outfielder’s debut was historic, he hit a rough patch afterward, then got rolling again and was mashing once more. There was plenty of good, some bad, and some ugly in the mix, but the upside was loud enough to make an impression.
The power jumps off the page. Baez finished with a .280 ISO, which ranked first among rookies with at least 100 plate appearances, and his .510 slugging percentage was fourth.
Stack that against the entire league and he still lands fourth in ISO and 23rd in slugging percentage. The bat speed is elite too, clocked at 77.5 MPH, and his average exit velocity, Barrel%, Hard-Hit%, and xSLG all point to the same thing: when Baez gets the barrel on the ball, the damage can be real.
The question is whether he can get to that contact often enough.
In 108 plate appearances, Baez struck out 30.6% of the time. That’s not exactly a death sentence, but it’s also not a profile built for easy success.
Among rookies with at least 100 plate appearances, that strikeout rate was the 10th-worst, and his 3.7% walk rate was the fourth-lowest. He also chased at a 39.6% clip, well above the league average of 28.6%, and his in-zone contact rate sat at 74.6%, far below the Major League average of 82.7%.
That’s the tightrope with Baez. The power is obvious. The contact questions are just as obvious.
The defensive side still has work to do, too. His arm is top-notch and his speed is good, but his instincts and fundamentals remain a work in progress. In that small sample, he finished at -3 outs above average, and despite the strong arm strength, his arm value came in at exactly 0.
Even with those flaws showing, Baez still put together a .788 OPS, a 112 wRC+, and 0.2 fWAR across 29 games. That’s the kind of line that keeps the spotlight on the ceiling, even when the floor is easy to see.
For the Cardinals, that’s the appeal. Development will decide how often Baez gets to his best version, and the organization has seen this kind of path before. Jordan Walker is the example of how that growth can turn into stardom, while Nolan Gorman serves as the warning sign of a young hitter with big power and big swing holes that never fully went away.
Baez has already handled major adversity in his career, and that’s part of why the belief in him runs so high. The rest of the 2026 season will be lost, but the long view is what matters here. The ceiling is massive, and the Cardinals have every reason to be intrigued by it.
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Cardinals Just Lost A Bullpen Option At A Telling Time
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Bernal has impressed in limited major league action with both his defense and his bat, while Church has been a steady presence throughout the 2026 season. Even with those pieces coming into focus, the roster still has some unfinished business, especially at third base and in the bullpen, where the Cardinals know they need more help before the picture is complete. [Read more 🡒]
Cardinals Rebuild Suddenly Looks Smarter After That Deadline Deal
At the trade deadline, the Cardinals made one of those moves that looked more like a long-term reset than a quick fix, shipping right-hander Dustin May to Milwaukee in a deal that brought back outfield prospects Alexander Frias and Josiah Ragsdale, along with JoJo Romero. For a St. Louis club in rebuild mode, the return was about adding depth to the system and betting on younger talent that could matter down the line.
Since then, the deal has only seemed to age better for St. Louis. May has not been as effective with the Brewers as many expected, while the Cardinals have been able to point to the prospect haul as another reason their farm system looks stronger. It is the kind of deadline trade that does not always pay off immediately, but for a rebuilding club, the early signs suggest the Cardinals may have come out ahead. [Read more 🡒]