Herrera (back) will begin a rehab assignment at Triple-A Memphis on Thursday, Lynn Worthy of the St. Louis Post-Dispatch reports.

Herrera is slated to catch five innings with Memphis on Thursday for his first game action since being placed on the IL on June 22 due to back soreness. Even when healthy, it's unclear if Herrera will stick around with the Cardinals considering Willson Contreras and Pedro Pages are both active.

The Nationals recalled Adams from Triple-A Rochester on Wednesday, Andrew Golden of The Washington Post reports.

Adams was optioned a month ago following a slump at the plate, but he's back after posting a .946 OPS with six homers in 22 games at Rochester. He will back up Keibert Ruiz.

The Nationals optioned Millas to Triple-A Rochester on Wednesday, Andrew Golden of The Washington Post reports.

The Nationals are swapping out backup catchers, with Riley Adams returning to back up Keibert Ruiz. Millas is 5-for-30 at the dish during his time in the big leagues this season.

Murphy is out of the lineup for Wednesday's game against the Giants.

After making back-to-back starts behind the dish, Murphy will give way to Travis d'Arnaud on Wednesday. Murphy swatted a solo home run in Tuesday's series opener against San Francisco.

Grandal is out of the lineup for Wednesday's game against the Cardinals.

Grandal will yield to Joey Bart behind the dish Wednesday. Grandal has logged merely three hits in his last 23 at-bats with two RBI and no runs.

Stephenson started at catcher, batted fifth and went 0-for-3 with a walk in Tuesday's 5-4 win over the Yankees.

Stephenson's availability to play was thrown into doubt after the Reds transferred him from the paternity list to the family medical emergency list. The transfer gave the Reds the option to not activate Stephenson for Tuesday, but the catcher was ready to go.

Realmuto (knee) participated in receiving drills and hit on the field ahead of Thursday's road game against the Cubs, Corey Seidman of NBC Sports Philadelphia reports.

The veteran catcher has recently been hitting in the batting cage but is now ready to hit on the field for the first time since undergoing meniscus surgery June 12. Realmuto still has significant work to do in his rehab program, but a return shortly after the All-Star break appears to be a reasonable target for his activation.

The Diamondbacks reinstated Moreno (thumb) from the 10-day injured list Tuesday.

The 24-year-old landed on the shelf with a sprained thumb June 22 and will rejoin Arizona after being on the injured list for the 10-day minimum. Moreno has a .230/.313/.346 slash line through 61 games this season and should reclaim primary catching duties for the Diamondbacks.

Amaya isn't in the Cubs' lineup for Tuesday's game against the Phillies.

Amaya will take a seat Tuesday after going just 1-for-10 at the plate over his last four games. Tomas Nido will start at catcher instead while batting ninth.

Rodriguez (elbow) has taken live BP from the left side, Andrew Destin of the Pittsburgh Post-Gazette reports.

Rodriguez underwent elbow surgery in December and is slated to miss the entirety of the 2024 season. He slashed .220/.284/.328 as a rookie last season.