The St. Louis Cardinals have officially moved on from minor league pitcher Zack Showalter, ending a chapter connected to one of the organization’s most closely watched trades in recent years. Showalter was one of the three players acquired from the Baltimore Orioles in the deal that sent veteran starter Jack Flaherty out of St. Louis. Now, less than a few years later, the Cardinals have decided to release the young right-hander after continued struggles in the minors.
The decision was first reported by Cardinals insider Jeff Jones, who noted that César Prieto is now the only remaining player from the Flaherty trade still connected to the organization. Drew Rom, another pitcher included in the package, has already departed, leaving Prieto as the lone player still capable of turning the deal into a long-term success story for the Cardinals.
For many fans, Showalter’s release represents another reminder of how unpredictable prospect development can be. When St. Louis originally acquired him, there was legitimate excitement surrounding his upside. Scouts and analysts were intrigued by his unique fastball movement and believed his raw stuff could eventually develop into something valuable at the professional level. At the time of the trade, some evaluators even considered him one of the more interesting lower-level pitching prospects in Baltimore’s farm system.
However, translating potential into consistent production proved difficult.
Showalter struggled badly during the 2026 season, finishing with a staggering 15.58 ERA across only 8.2 innings pitched. The Cardinals eventually chose to cut ties rather than continue investing a roster spot in a pitcher who had not shown enough progress. The move came as the organization continued reshaping its pitching depth throughout the minor league system.
The release happened shortly after the Cardinals reinstated pitcher Sam Brodersen from the development list, signaling another example of the front office making rapid decisions regarding roster flexibility and player evaluation. Under President of Baseball Operations Chaim Bloom, the organization has adopted a more aggressive approach toward development and roster management, particularly within the farm system.
Despite the disappointing ending, Showalter’s path through professional baseball once looked promising. Originally selected by Baltimore in the 11th round of the 2022 MLB Draft, the right-hander quickly generated attention for his unusual pitching profile. His fastball carried movement that made it difficult for hitters to square up consistently, and evaluators believed his delivery gave him the potential to become an effective pitcher if his secondary offerings improved.
Still, scouts also recognized concerns early in his development. Reports frequently mentioned that his breaking ball lacked consistency and that his changeup remained underdeveloped. Those weaknesses made some talent evaluators question whether he would eventually settle into a bullpen role instead of becoming a reliable starter.
That uncertainty followed him throughout his time in the Cardinals organization.
Although the overall numbers this season were rough, Showalter did show flashes of promise during previous years in the minors. In 2025, he posted a solid 3.48 ERA while pitching across three different levels in the organization. During that stretch, there were moments where it appeared he might finally be putting everything together. His fastball remained effective at times, and there were encouraging signs regarding his ability to attack hitters more confidently.
Unfortunately for Showalter, consistency remained elusive.
Baseball development is rarely linear, especially for pitchers. Small mechanical issues can dramatically impact performance, command, and health. Several observers around the Cardinals system believed Showalter’s delivery may have contributed to his struggles. Some evaluators felt his mechanics limited his ability to repeat pitches effectively, while others suggested the delivery placed additional pressure on his overall command.
After the news became public, reactions quickly spread across baseball circles and social media. Many fans expressed disappointment because they once viewed Showalter as an underrated part of the Flaherty trade package. Others pointed out that prospect evaluation is often unpredictable, with highly regarded players failing to develop while overlooked names sometimes become stars.
Several analysts noted that the Cardinals’ return in the Flaherty trade now appears far thinner than originally expected. When St. Louis dealt Flaherty, the organization hoped the incoming players would help strengthen both the present and future of the franchise. Instead, injuries, inconsistency, and stalled development have prevented the deal from delivering significant long-term value so far.
That places additional attention on César Prieto.
Prieto has emerged as the lone remaining player from the trade who could still provide meaningful major league contributions for St. Louis. The infielder recently earned a promotion after a strong offensive run in Triple-A, where he posted a .923 OPS while demonstrating excellent plate discipline. His ability to consistently make contact and avoid strikeouts has generated optimism within the organization.
If Prieto eventually establishes himself as a productive major leaguer, the Cardinals may still salvage meaningful value from the Flaherty trade. If not, the deal could become another difficult chapter in the organization’s recent history of roster decisions and player development outcomes.
Meanwhile, Showalter now enters an uncertain phase of his career. At only 22 years old, he still has time to rebuild his value and continue developing elsewhere. It would not be surprising if another organization decides to take a chance on his arm talent, especially given how many teams continue searching for pitching depth across the minor leagues.
In modern baseball, released prospects often receive second opportunities. A change in coaching, mechanics, or organizational philosophy can sometimes completely reshape a player’s career trajectory. Because Showalter still possesses intriguing raw traits, there remains a possibility another club believes it can unlock his potential.
For the Cardinals, though, the move reflects a larger organizational philosophy. The front office appears increasingly focused on moving quickly when evaluating talent rather than allowing struggling players extended opportunities without visible progress. That strategy may create difficult decisions, but it also reflects the urgency surrounding the franchise’s effort to remain competitive while rebuilding long-term depth.
Ultimately, Showalter’s release serves as another reminder of the volatility of baseball prospects. Players once viewed as valuable trade assets can quickly fall out of plans when development stalls, injuries occur, or performance declines. While his time with the Cardinals did not unfold as many expected, his story may not be finished yet.
At the same time, the Cardinals continue searching for answers regarding the long-term outcome of the Jack Flaherty trade. With only Prieto remaining from the original return package, the pressure now falls heavily on him to provide the kind of production St. Louis hoped to receive when they made one of their most significant roster moves in recent seasons.
