Contreras (forearm) hit soft toss Tuesday and caught a bullpen session, Daniel Guerrero of the St. Louis Post-Dispatch reports.

Contreras had previously been throwing, running and catching, but Tuesday marks the first time he's swung a bat since undergoing surgery May 9. The 32-year-old also caught a bullpen from Nick Robertson on Tuesday, an encouraging sign considering the fractured wrist was on his glove hand. Still, it's been just over four weeks of what's expected to be a 10-week recovery period for Contreras, which puts a timeline for return in the middle of July.

Stubbs is starting behind the plate and batting eighth Tuesday against the Red Sox, Alex Coffey of The Philadelphia Inquirer reports.

The 31-year-old will be making just his 15th start of the season, but he should have a more regular role for the foreseeable future with J.T. Realmuto (knee) landing on the injured list Tuesday. Stubbs has a .173/.271/.192 slash line in 59 plate appearances this season and doesn't offer much fantasy upside.

Herrera is out of the lineup for Tuesday's game against the Pirates, Jeff Jones of the Belleville News-Democrat reports,

It's the second straight game on the bench for Herrera, who started the previous 14 games and posted a .559 OPS during that span. Pedro Pages will receive another start behind the plate and bat eighth Tuesday.

Diaz (calf) is not in the lineup for Tuesday's game in Minnesota.

Diaz tweaked his left calf in Monday's loss to the Twins and the expectation is that he won't be available for the remainder of the series. Jacob Stallings will do the catching Tuesday.

The Mets designated Nido for assignment Tuesday, Mike Puma of the New York Post reports.

Francisco Alvarez is back from the injured list and the Mets have elected to keep Luis Torrens around as his backup. Given his $2.1 million salary, Nido might clear waivers and remain in the organization.

The Mets activated Alvarez (thumb) from the 10-day injured list Tuesday, Mike Puma of the New York Post reports.

Alvarez has been sidelined since late April with a fractured left thumb but is ready to roll after playing in six rehab games. It's possible the Mets will ease him back into everyday action with some extra off days mixed in, but he will immediately regain his role as the club's primary catcher. Alvarez was slashing .236/.288/.364 with one home run in 16 contests before getting hurt.

Marchan was recalled from Triple-A Lehigh Valley on Tuesday.

The 25-year-old was with the Phillies as the 27th man for the two-game series versus the Mets in London, and he's now fully on the big-league roster with J.T. Realmuto (knee) landing on the injured list. Marchan hasn't seen MLB action since 2021, but that will change the first time he operates as the backup to fill-in catcher Garrett Stubbs.

The Phillies placed Realmuto on the 10-day injured list Tuesday with right knee pain, and he's scheduled to undergo a meniscectomy Wednesday.

According to Matt Gelb of The Athletic, Realmuto has been playing through the injury for nearly a month, and the Phillies elected to address the injury now rather than attempting to wait things out. Gelb also reports that Realmuto will miss roughly a month, potentially setting him up for a mid-July return from the shelf. Rafael Marchan was called up from Triple-A Lehigh Valley in a corresponding move and should serve as the backup catcher to Garrett Stubbs.

Rockies manager Bud Black suggested after Monday's 5-0 loss to the Twins that Diaz will likely miss the remaining two games of the series in Minnesota due to a strained left calf, MLB.com reports. "It's right in the belly of the calf, so we'll see," Black said of the injury Diaz suffered in the first inning of Monday's game. "He's been feeling it for a couple weeks. He's been able to manage it and [in Monday's game], I think just on that particular ground ball, out of the box, it got him. We'll see in a couple of days. Keith [Duggar, the team's head athletic trainer] wants to treat it for a day or two and see where we are."

Diaz was lifted from the game in the bottom of the first after he strained his calf while running out a groundball in his first at-bat of the night in the top of the frame. Jacob Stallings came on to replace Diaz and will presumably start behind the plate for the final two games in Minnesota, and Stallings could be headed for an extended run as the Rockies' No. 1 catcher if Diaz requires a stint on the injured list. Diaz will presumably be re-examined Thursday when the Rockies return to Colorado before the team makes a decision on his availability heading into this weekend's series versus the Pirates. Diaz has been one of the few bright spots for the Rockies this season, batting .303 with five home runs, 28 RBI and 20 runs in 55 games.

Diaz left Monday's game against the Twins due to a left calf injury, Luke Zahlmann of The Denver Gazette reports.

Diaz is likely undergoing additional testing to uncover the extent of the calf injury. Jacob Stallings and Hunter Goodman would share time behind the plate if it's determined Diaz requires an extended absence, though it's still too early to know if he'll be placed on the injured list.