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Tyler Zuber RP | MIA
Marlins' Tyler Zuber: Undergoing UCL surgery
Zuber will undergo UCL surgery with an internal brace on his right elbow Monday, Christina De Nicola of MLB.com reports.
The internal brace procedure comes with a shorter rehab timetable than a full Tommy John surgery, but Zuber nonetheless could be sidelined until the 2028 season. Zuber posted a 5.67 ERA in 2026 thanks in large part to 10 home runs allowed in 39.2 innings, but a 42:11 K:BB offered more promise.
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Edwin Diaz RP | LAD
Dodgers' Edwin Diaz: Notches second straight save
Diaz retired all three batters he faced with one strikeout to earn the save in Game 4 of the NLDS against Atlanta on Wednesday.
It's the second straight day with a save for Diaz, who was shifted to a low-leverage role late in the season and also dealt with a neck injury. Tanner Scott operated as the Dodgers' primary closer down the stretch, but he surrendered two runs in Game 1 and was used in a setup role Wednesday. Diaz's 8.68 ERA in 21 appearances during the regular season will likely prevent him from being viewed as a lockdown closer this October, but he's been unscored upon in his last eight appearances (three postseason) and is clearly back in the high-leverage mix for manager Dave Roberts.
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Mason Miller RP | SD
Padres' Mason Miller: Back for Game 4
Miller was reinstated from the paternity list ahead of Game 4 of the NLDS versus the Brewers on Wednesday.
He was away from the club for Game 3 on Tuesday in order to attend the birth of his first child, but it will be only a one-day absence for the star closer. Miller was saddled with a blown save and loss in Game 2 on Sunday.
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Riley O'Brien RP | STL
Cardinals' Riley O'Brien: Aims to add muscle over offseason
O'Brien said recently that he wants to put on "as much muscle as I can" this offseason in order to help his body absorb the toll of the 2027 season, Daniel Guerrero of the St. Louis Post-Dispatch reports.
O'Brien finished tied for the National League lead with 38 saves this season, but he faded after the All-Star break, posting a 5.11 ERA, 1.54 WHIP and 25:16 K:BB over 24.2 innings while blowing four of 18 save chances. The 31-year-old also saw his velocity dip in the second half, as he averaged 97 mph with his four-seamer after averaging 98.2 mph with the pitch in the first half. As things stand right now, O'Brien is the clear favorite to open next season as the Cardinals' closer again.
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Adrian Morejon RP | SD
Padres' Adrian Morejon: Was unavailable with shoulder issue
Padres manager Craig Stammen said after Tuesday's NLDS Game 3 win over the Brewers that Morejon was unavailable to pitch in the contest due to "stickiness in his shoulder," AJ Cassavell of MLB.com reports.
With Morejon and Mason Miller (paternity) unavailable, Michael King closed out Tuesday's victory. Morejon's shoulder issue appears to be minor, as Stammen said the left-hander could be ready to pitch in Game 4, if needed. The southpaw has allowed one run with a 2:0 K:BB over four innings in two appearances this postseason.
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Edwin Diaz RP | LAD
Dodgers' Edwin Diaz: Records save in Game 3
Diaz earned the save in Game 3 of the NLDS against Atlanta on Tuesday, allowing a hit with no walks or strikeouts in a scoreless ninth inning.
The 32-year-old entered for the ninth with a 3-1 advantage, and he got off to an inauspicious start as Ozzie Albies doubled to open the frame. Diaz dialed in from there, however, and retired the next three batters to tally his first save since mid-August. The right-hander was plagued by injuries and ineffectiveness this year -- which resulted in him losing the closer role -- but he finished the regular season with five straight scoreless outings and has been unscored upon in his first two appearances of the playoffs. He seems unlikely to fully reclaim the closer role given that Evan Phillips was called upon for the save in the series opener, but it still appears that Diaz has regained the trust of manager Dave Roberts.
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Wandy Peralta RP | SD
Padres' Wandy Peralta: Added to NLDS roster
The Padres added Peralta to their NLDS roster Tuesday, Alden Gonzalez of ESPN.com reports.
Peralta will join San Diego's NLDS roster as a temporary replacement for Mason Miller, who was placed on the postseason paternity list Tuesday. If the Padres extend the series long enough to allow Miller to return, Peralta would be forced back off the roster.
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Mason Miller RP | SD
Padres' Mason Miller: Placed on paternity list
The Padres placed Miller on the postseason paternity list Tuesday, Alden Gonzalez of ESPN.com reports.
Miller will be permitted to spend no more than three days away from the team while he welcomes a new addition to his family, and he'll be allowed to rejoin the active roster immediately upon returning if San Diego is able to extend the series. In the meantime, the Padres will add Wandy Peralta to their NLDS roster to replace Miller in the bullpen.
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Mason Miller RP | SD
Padres' Mason Miller: Falters in Milwaukee
Miller was charged with the loss and a blown save in Game 2 of the NLDS against the Brewers on Sunday. He gave up two runs on a hit and three walks with two strikeouts over 1.2 innings.
Padres manager Craig Stammen called on his closer for a six-out save in Game 2, and Miller hit the ground running with a clean eighth inning that included two punchouts. The right-hander started the ninth by inducing a groundout, but his command wavered from there as he walked three of the next four batters to set up Jackson Chourio for a walk-off, two-run single. Miller had two six-out appearances in 66 outings during the regular season but was unable to close things out Sunday. Milwaukee forced him to throw 40 pitches, which was his highest workload since 2023 with the A's. His availability would likely be in question for Tuesday's Game 3 were it not the playoffs, but it'll likely be all-hands-on-deck situation with San Diego facing elimination.