The St. Louis Cardinals made a notable change to their bullpen on Sunday, choosing to send one of their surprising breakout relievers from 2025 back to the minor leagues. The move came during a day that was already disrupted after the team’s series finale against the Cincinnati Reds was postponed because of severe weather conditions in the area.
The postponed contest will now be played on August 17 as part of a split doubleheader, with the first game scheduled for 1:40 p.m. ET. Although fans were disappointed that the matchup could not take place, there was still significant roster news before the game was officially called off.
One of the biggest developments involved pitching prospect Brycen Mautz, who had been expected to make his long-awaited major league debut. Prior to the postponement, the Cardinals announced that the young left-hander had been promoted from Triple-A Memphis to the big league roster. The organization made room for him by optioning right-handed reliever Matt Svanson back to Triple-A. Another pitcher, Ryan Fernandez, was also returned to Memphis after serving as the club’s extra player during Saturday’s doubleheader.
The Cardinals celebrated Mautz’s call-up with excitement, highlighting the fact that he had earned the organization’s 2025 Minor League Pitcher of the Year honors. Even though the game was postponed, reports later confirmed that Mautz would remain with the major league club as they prepare for an upcoming series against the Milwaukee Brewers.
For Svanson, however, the demotion reflects a difficult season that has been far different from the success he enjoyed a year ago. The right-hander emerged as one of the Cardinals’ most dependable bullpen arms during the 2025 campaign, posting a stellar 1.94 ERA across 39 appearances. His strong production made him one of the more reliable relief options on the roster and helped establish him as a key contributor.
This season has been much more challenging. Through 24 appearances, Svanson has struggled badly, recording an 8.77 ERA over 25 2/3 innings pitched. Opposing hitters have consistently found success against him, and the dominance he showed during his breakout year has largely disappeared. As a result, the Cardinals decided that a reset in Triple-A was the best option for both the player and the team.
The organization is hopeful that time in the minors will allow Svanson to regain his confidence and sharpen his mechanics. If he can rediscover the form that made him such an effective bullpen piece in 2025, he could still become an important contributor later in the season. His dramatic statistical drop illustrates the issue clearly. Last year, Svanson produced 1.7 WAR, but this season he has fallen to negative value at minus-1 WAR.
In the meantime, Mautz will have an opportunity to prove himself at the major league level. The Cardinals are optimistic that the young left-hander can provide a spark to the pitching staff while Svanson works through his struggles in Memphis.
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