Matt Chapman (abdomen) not progressing as hoped

Núñez rejoined New York’s bullpen for Tuesday’s game against the Guardians after wrapping up a minor league rehab assignment. The hard-throwing 30-year-old has been out since undergoing Tommy John surgery last July.

Pache was a big-time prospect with the Braves a couple years ago and wound up being one of the centerpieces of the Matt Olson trade with the Athletics. The 27-year-old is a phenomenal defender, but he simply hasn’t hit enough to be an everyday option at the highest level. He’s bounced around between a couple different clubs with the Mets being the latest to roll the dice on him as a zero-risk reclamation project.

Lavender gets his chance with New York after their teardown at the trade deadline earlier this week. The 26-year-old lefty has posted a respectable 3.77 ERA and 70/16 K/BB ratio across 43 innings in the minors this season.

Yan receives his first opportunity in the majors in the wake of New York’s fire sale at the trade deadline. The 29-year-old, who is best known for his theatrics on the mound, signed a minor league deal with the Mets last August. He’ll be making his big-league debut when he gets into a game.

Melendez passed through waivers unclaimed after being designated for assignment over the weekend in a procedural move. The 27-year-old slugger was shipped to the minors back in late June after hitting .192/.315/.350 with four homers and 50 strikeouts in 144 plate appearances.

Herget went unclaimed on waivers after being removed from New York’s roster over the weekend. He’ll probably stick around as organizational relief depth.

Krook winds up back with Washington as emergency organizational relief depth after electing free agency last week. The 31-year-old southpaw allowed four runs over 4 2/3 innings during a pair of brief stints with the Nationals.

Altavilla exercised the opt-out in his minor league contract with the Royals that he signed last month. The 33-year-old journeyman has made 152 career appearances in the big leagues since 2016.

San Diego manager Craig Stammen added that Robbie Ray will make his debut against the Astros on Friday. Mize was a last-minute addition at the trade deadline after posting a strong 2.70 ERA, 0.99 WHIP and 85/19 K/BB ratio across 86 2/3 innings for the Tigers. He’s been battling some lingering groin issues throughout the year, but he’s ready to roll this week after heading out west.

Stammen added that Pivetta was able to throw 30 pitches in the bullpen after experiencing some discomfort throughout his warmup process. It’s an encouraging update after Pivetta abruptly exited his first rehab outing. The 33-year-old is working his way back from a flexor strain that put him on the shelf back in mid-April. He’ll be reevaluated later this week to determine that he’s fine from a physical standpoint to continue his rehab assignment. It doesn’t sound like a worst-case scenario. Still, it’s going to be challenging for Pivetta to make it back to San Diego before the regular season concludes.