Matt Koperniak - MLB News, Rumors, & Updates | FOX Sports

Released by St. Louis The Cardinals released Koperniak on Wednesday.

Impact Koperniak was added to St. Louis' 40-man roster after the 2024 season, but he had a sub-.700 OPS each of the last two seasons at Triple-A Memphis and is now out of the organization. The 28-year-old will now be on the lookout for a new minor-league deal elsewhere.

JULY 16 • ROTOWIRE

Remains in organization The Cardinals outrighted Koperniak to Triple-A Memphis on Friday.

Impact While no longer on the 40-man roster, Koperniak will remain in the organization after passing through waivers unclaimed. The 27-year-old outfielder is coming off a poor 2025 season at Memphis, slashing .249/.322/.387 across 537 plate appearances.

DECEMBER 19, 2025 • ROTOWIRE

Dustin May and St. Louis Cardinals agree to $12.5 million, 1-year contract

Right-hander Dustin May and the St. Louis Cardinals have agreed to a $12.5 million, one-year contract

DECEMBER 17, 2025 • Associated Press

Booted from 40-man The Cardinals designated Koperniak for assignment Wednesday, Jeff Jones of the Belleville News-Democrat reports.

Impact Koperniak will lose his 40-man roster spot in order to make room for Dustin May, who officially signed with St. Louis on Wednesday. Koperniak, 27, spent all of 2025 at Triple-A Memphis and endured his worst minor-league season yet, slashing .249/.322/.387 across 537 plate appearances.

DECEMBER 17, 2025 • ROTOWIRE

Cardinals World Baseball Classic News: Brendan Donovan, Ivan Herrera, Matt Koperniak Several Cardinals could represent their countries at the 2026 WBC.

DECEMBER 9, 2025 • REDBIRDRANTS.COM

Back with Triple-A Memphis Koperniak was optioned to Triple-A Memphis on Sunday, Daniel Guerrero of the St. Louis Post-Dispatch reports.

Impact Koperniak was enjoying a great spring training, slashing .355/.394/.645 with two home runs across 31 at-bats. In Triple-A Memphis during the 2023 through 2024 seasons, he hit for an OPS of .839 with 34 home runs across 935 plate appearances. The London born outfielder will now make appearances in Triple-A Memphis for a fourth season.

MARCH 16, 2025 • ROTOWIRE

Continues impressive spring Koperniak went 1-for-3 with a two-run homer in Tuesday's Grapefruit League game against the Mets.

Impact Koperniak is having a nice spring thus far after being added to the 40-man roster this offseason, going 5-for-16 with one homer, one stolen base and a couple walks. The 27-year-old slashed .309/.370/.512 with 20 home runs in 2024 at Triple-A Memphis and is likely headed back there to start this season, although it's possible he could push for a reserve spot if Jordan Walker's knee injury forces him to miss time.

MARCH 4, 2025 • ROTOWIRE

Contract selected The Cardinals selected Koperniak's contract from Triple-A Memphis on Tuesday.

Impact Koperniak is coming off a terrific season with Memphis, having slashed .309/.370/.512 with 20 home runs. He'll turn 27 in February and is more of a fourth outfielder type, but St. Louis felt obligated to keep him away from the Rule 5 Draft.

NOVEMBER 19, 2024 • ROTOWIRE