MLB Player News

The Cardinals released Koperniak on Wednesday.

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.

Davis (undisclosed) was activated from the 7-day injured list and promoted from Double-A Springfield to Triple-A Memphis on Wednesday.

Davis missed one month of action with an undisclosed injury and had played six rehab games. The 24-year-old has slashed .231/.359/.446 with eight home runs, nine stolen bases and a 26:38 BB:K over 37 games this season during his time with Springfield. The 2023 first-round pick will be getting his first taste of the Pacific Coast League.

Zimmermann elected to become a free agent Wednesday.

Zimmermann cleared waivers after being removed from the Cardinals' 40-man roster, but he's chosen free agency rather than accepting an outright assignment. The southpaw could re-sign with St. Louis on a new minor-league contract, but he is free to negotiate with any team. Zimmermann permitted three earned runs in five innings in a bulk-relief appearance earlier this month in his lone outing for St. Louis.

Blewett has exercised an opt-out clause in his minor-league contract with the Cardinals, Derrick Goold of the St. Louis Post-Dispatch reports.

The Cardinals now have the choice of either adding him to their 40-man roster or letting him depart as a free agent. Blewett has spent the entire season at Triple-A Memphis, holding a 5.18 ERA and 63:19 K:BB over 48.2 innings.

Morgan (knee) began a rehab assignment at the rookie-level Arizona Complex League on Wednesday, yielding one hit and two walks with one strikeout in one-third of an inning, Jeff Sanders of The San Diego Union-Tribune reports.

It's the first game action since late June for Morgan, who is coming back from left knee inflammation. If all goes well, the reliever could make a few more rehab appearances before rejoining the Padres' bullpen at some point in the latter portion of July.

Walcott (elbow) began a rehab assignment at the rookie-level Arizona Complex League on Tuesday and has gone 3-for-6 with one home run and one stolen base.

Working his way back from internal brace surgery on his right elbow, Walcott has been used in the designated-hitter spot in his first two rehab games. He's been playing catch, but it's not clear when he will be ready to play the field in games. Walcott finished the 2025 season at Double-A Frisco and will either return to that level or move up to Triple-A Round Rock as his rehab advances.

Oliveto (toe) has gone 3-for-13 with a triple, five walks, two RBI and two runs in five games since being assigned to the rookie-level Florida Complex League after being reinstated from Single-A Lakeland's injured list.

Oliveto had already been on a rehab assignment in the FCL prior to being activated from the IL, going 8-for-37 (.216 average) with an 8:6 BB:K over 12 games. The 19-year-old catcher has shown a discerning eye at the plate through 17 total FCL games with a 20.6 percent walk rate across 63 plate appearances. He could get the chance to debut for Lakeland later on this season.

Burns (groin) will start Tuesday's game against the Mariners at T-Mobile Park.

Burns dealt with a groin issue during his most recent start July 8 against the Phillies, prompting him to pull out of his first All-Star Game appearance. The injury was never viewed as a major concern, and with the All-Star break providing Burns with some extra time to recuperate, he won't have to miss a turn through the rotation. The 23-year-old righty closed the first half with an 11-1 record, 2.54 ERA, 1.11 WHIP and 118:37 K:BB across 102.2 innings over 18 starts.

The Athletics selected White's contract from Triple-A Las Vegas on Wednesday, Jeff Passan of ESPN.com reports.

White has quickly ascended the ranks of the Athletics' farm system since being drafted 40th overall in 2024, and he'll now get a chance to contribute for the big club after slashing .303/.345/.489 with nine homers, 47 RBI and 44 runs in 55 games at Las Vegas. The 23-year-old will help bolster the Athletics' corner-infield depth and could even make a handful of starts while both Nick Kurtz (thumb) and Zack Gelof (knee) are on the injured list.

Donovan (groin) will begin a rehab assignment in the Arizona Complex League on Wednesday, Shannon Drayer of SeattleSports.com reports.

Donovan was initially expected to begin his assignment in rookie ball earlier this month, but after several extra days of working out at the Mariners' Arizona complex, he's finally been cleared to test his strained left groin in a competitive setting. The 29-year-old has been on the shelf for nearly two full months, so the M's are likely to keep him in the minors for an extended period of time before adding him back to the active roster.