Diaz (hand) is starting behind the plate and batting seventh Friday against the Angels, Matt Kawahara of the Houston Chronicle reports.

Diaz sat out the past few days due to a hand injury but will return to action for Friday's series opener versus the Halos. The 26-year-old will look to continue his modest five-game hit streak, during which he's gone 7-for-19 with three walks and a homer.

Realmuto isn't part of the starting lineup for Friday's game against Atlanta, Lochlahn March of The Philadelphia Inquirer reports.

Realmuto will get the night off Friday after making four straight starts behind the plate. He went 1-for-15 with a two-run home run during that stretch. Rafael Marchan will fill in for Realmuto at catcher.

Ruiz (concussion) is ramping up baseball activities and is expected to begin a minor-league rehab assignment soon, Bobby Blanco of MASNSports.com reported Friday.

Ruiz started taking swings in batting practice last week, a significant stride in his recovery from a concussion he sustained in early July. The catcher will ramp up baseball activities this weekend, and the expectation is that he'll be cleared to begin a rehab assignment soon. In the meantime, Riley Adams and C.J. Stubbs will handle catching duties.

Nationals interim manager Miguel Cairo said Friday that Millas will not return this season after undergoing surgery Friday to stabilize the fracture and repair the joint on his left index finger, Bobby Blanco of MASNSports.com reports.

Millas suffered the injury on a catcher's interference during Wednesday's game against the Yankees. The Nationals expect him to be ready for the beginning of spring training.

The Cardinals placed Pozo on the 7-day concussion injured list Friday.

Pozo was able to remain in the game after being shaken up by a foul tip to the mask Thursday against the Pirates, but concussion symptoms eventually surfaced and he'll have to miss some time. The Cardinals will go with Jimmy Crooks and Pedro Pages at catcher while Pozo is sidelined.

Kirk (hand) is catching and batting sixth Friday against Milwaukee.

Kirk's right hand swelled up after being hit by a foul tip during Tuesday's game. While he finished Tuesday's contest, he was held out of Wednesday's game. The catcher will make his return to the starting lineup Friday and will look to extend his five-game hit streak.

The Cardinals selected Crooks' contract from Triple-A Memphis on Friday.

Crooks has slashed .337/.404/.518 with three home runs in August with Memphis and has hit .274/.337/.441 with 14 home runs there for the full season. The left-handed hitter could be worth a look in fantasy leagues if the Cardinals use him on the long side of a platoon at catcher with Pedro Pages. Crooks is not in the lineup for Friday's game in Cincinnati against righty Zack Littell, though the Cardinals could just be giving him a day to get settled in.

Narvaez is out of the lineup for Friday's game against the Pirates, Tim Healey of The Boston Globe reports.

Narvaez has been ceding more work to Connor Wong recently, and it'll be Wong who starts Friday's game behind the dish. Including Friday, both catchers have made five starts in Boston's last 10 games.

The Nationals selected Stubbs' contract from Triple-A Rochester on Friday, Andrew Golden of The Washington Post reports.

The former Astros farmhand will take the place of Drew Millas (finger) on the active roster. Stubbs will be making his MLB debut when he gets into a game and is set to serve as Riley Adams' backup at catcher.

The Nationals placed Millas on the 10-day injured list Friday with a fractured and dislocated left index finger.

Millas suffered the injury when he was struck by an Austin Wells swing during Wednesday's game against the Yankees. The Nationals haven't revealed a timeline for Millas' return, but there's a good chance he's done for the season.