The Cardinals optioned Mathews to Triple-A Memphis on Tuesday.
Mathews held the Reds to one run over four innings in the first game of Monday's doubleheader against the Reds. There's not currently room for the left-hander in the Cardinals' rotation, so he'll return to Memphis for now until another opportunity arises.
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Cardinals' Quinn Mathews: Fans seven in spot start
Rotowire
Mathews completed four innings in Game 1 of Monday's doubleheader against Cincinnati, allowing one run on two hits and three walks while striking out seven batters in a no-decision.
Mathews was called up from Triple-A Memphis early Monday and handed the ball for the matinee. The southpaw held his own, allowing just one run on a fourth-inning solo homer by Dane Myers. Mathews racked up 12 whiffs and seven punchouts, though he was a bit wild and needed 95 pitches (55 strikes) to complete only four frames. It was just the second appearance of the 25-year-old's big-league career; in his MLB debut Aug. 1 in Toronto, Mathews yielded three runs over five innings in a loss. Unless St. Louis opts to shift to a six-man rotation, there doesn't seem to be room for Mathews to remain with the big-league club as a starter for now, but he'd likely be a top candidate to move into the rotation should any of the Cardinals' other starters suffer an injury or get demoted.
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Cardinals' Quinn Mathews: Returning to start Monday
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The Cardinals will recall Mathews from Triple-A Memphis to start the first game of Monday's doubleheader with the Reds in Cincinnati, Derrick Goold of the St. Louis Post-Dispatch reports.
Mathews will make his second career big-league start after he tossed five innings and allowed two runs on six hits and three walks while striking out three batters in his major-league debut Aug 1. versus Toronto. The southpaw has produced a 3.27 ERA and 1.23 WHIP with 120 punchouts over 99 innings in 21 starts with Memphis this season.
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Cardinals' Quinn Mathews: Promoted ahead of start
Rotowire
The Cardinals selected Mathews' contract from Triple-A Memphis on Saturday.
After posting a 3.13 ERA and 1.14 WHIP through 92 innings at Memphis, Mathews will make his MLB debut Saturday against a Blue Jays lineup that's put up just a .642 OPS since the All-Star break. His promotion gives the Cardinals six starters in their rotation, though the 25-year-old could claim a permanent spot with the big club if St. Louis trades away another starter before the deadline Monday. Matt Svanson was optioned to Triple-A Memphis to make room for Mathews on the active roster, and Tink Hence was DFA'd to clear a 40-man spot.
Mathews is no longer listed among the upcoming probable pitchers at Triple-A Memphis and could join the Cardinals' rotation soon, Jeff Jones of the Belleville News-Democrat reports.
Mathews had been scheduled to start Thursday, but now he's not listed among Memphis' probables through Sunday. The left-hander could enter the Cardinals' rotation as soon as this weekend in Toronto, taking the spot of Dustin May, who is expected to be traded before Monday's deadline. Mathews has been on a roll at Memphis, authoring a 1.55 ERA and 59:19 K:BB over 52.1 innings since the beginning of June.
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Cardinals' Quinn Mathews: Reassigned to minors camp
Rotowire
The Cardinals reassigned Mathews to minor-league camp Monday.
Mathews showed encouraging signs in his last Grapefruit League appearance in racking up seven strikeouts over 2.2 innings, but he was always destined to open the season in the rotation at Triple-A Memphis. The southpaw will be seeking a bounce-back year after he stumbled in 2025 with a 3.93 ERA and 107:74 K:BB over 94 innings with Memphis.
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Cardinals' Quinn Mathews: Sharp in third spring outing
Rotowire
Mathews allowed two runs (one earned) on two hits while striking out seven over 2.2 frames in Thursday's Grapefruit League appearance against the Pirates.
Mathews served up a home run in his final inning of work after Nolan Gorman had committed an error. The lefty's outing was very encouraging on the whole, though. Mathews averaged 95.2 mph with his four-seamer, induced 12 whiffs on 50 pitches and didn't issue a walk to go along with his seven punchouts. The lefty had been shaky in his first two appearances of the spring, so this was a nice step in the right direction. Mathews is slated to open 2026 in the Triple-A Memphis rotation.
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Cardinals' Quinn Mathews: Activated from Triple-A IL
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Mathews (shoulder) was activated from Triple-A Memphis' 7-day injured list Saturday.
After missing more than a month of action with left shoulder inflammation, Mathews tossed five scoreless innings with an 8:0 K:BB in two rehab outings before being activated. His first outing back in the Memphis rotation didn't go as well, as he yielded two runs with a 3:3 K:BB over 2.2 frames Saturday. The southpaw has permitted nine runs with a 10:18 K:BB in 13 innings covering four starts with Memphis this season, so he'll be looking to get back on track in June now that he has hopefully put his shoulder issue behind him.
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Cardinals' Quinn Mathews: Ready to return
Rotowire
Mathews (shoulder) will make a rehab start this week with the Cardinals' Florida Complex League affiliate, Derrick Goold of the St. Louis Post-Dispatch reports.
Mathews resumed a throwing program in late April as he bounces back from mild left shoulder soreness, and he's now ready to pitch in games. The left-hander will eventually move back up to Triple-A Memphis, where he posted a 6.10 ERA and 7:15 K:BB over his first 10.1 innings before getting injured.
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Cardinals' Quinn Mathews: Misses out on Opening Day rotation
Rotowire
The Cardinals reassigned Mathews to minor-league camp Sunday.
Though Mathews is regarded as one of St. Louis' top pitching prospects, he was always facing an uphill battle to win a spot in the Opening Day rotation after having made just four starts above the Double-A level. The 24-year-old southpaw should still make his MLB debut at some point in 2025, but for now, the Cardinals will send him to minor-league camp to open up more innings in Grapefruit League play for other rotation candidates. He'll continue to stay in a starter's schedule at minor-league camp, with Rob Rains of StLSportsPage.com noting that Mathews will cover three innings Sunday in a game on the back fields.
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Cardinals' Quinn Mathews: Promoted to Double-A
Rotowire
The Cardinals promoted Mathews from High-A Peoria to Double-A Springfield on Monday, Daniel Guerrero of the St. Louis Post-Dispatch reports.
Mathews is one of the biggest risers among pitching prospects this season, having dominated at both Single-A Palm Beach and Peoria, collecting a 2.18 ERA, 0.78 WHIP and 110:20 K:BB over 74.1 innings in 13 starts between the two stops. His 110 punchouts lead all minor leaguers. Mathews was a fourth-round pick in the 2023 First-Year Player Draft and didn't pitch in pro ball last season after throwing 124.2 innings in the spring as a senior at Stanford. He has elevated his standing in 2024 by showing a velocity spike.
