Matt Koperniak
CF STL
Fri 12/19/25 1:48 PM

The Cardinals outrighted Koperniak to Triple-A Memphis on Friday.
EDGE Analysis
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.

Matt Koperniak
CF STL
Wed 12/17/25 5:24 PM

The Cardinals designated Koperniak for assignment Wednesday, Jeff Jones of the Belleville News-Democrat reports.
EDGE Analysis
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.

Matt Koperniak
CF STL
Sun 3/16/25 5:33 PM

Koperniak was optioned to Triple-A Memphis on Sunday, Daniel Guerrero of the St. Louis Post-Dispatch reports.
EDGE Analysis
Koperniak was enjoying a great spring training, slashing .355/.394/.645 with two home runs across 33 plate appearances. In Triple-A Memphis over the 2023 and 2024 seasons, he posted an OPS of .839 with 34 home runs across 935 plate appearances. The London-born outfielder will now play in Triple-A Memphis for a fourth season.

Matt Koperniak
CF STL
Tue 3/4/25 3:19 PM

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