O'Brien struck out the only batter he faced to earn the save in Tuesday's 9-8 win over the Giants.

JoJo Romero faced the minimum three batters in the ninth inning, leaving with two outs and Matt Chapman on second base after a double. O'Brien came in and struck out pinch hitter Wilmer Flores on five pitches to strand the tying runner. This was O'Brien's sixth save of the year, all of which have come since Ryan Helsley was traded to the Mets. For the season, O'Brien has added six holds while maintaining a 1.96 ERA, 1.11 WHIP and 43:21 K:BB through 46 innings.

Scott (1-4) allowed two runs on a hit, a walk and a hit batsman over two-thirds of an inning, taking a blown save and the loss Tuesday versus the Diamondbacks.

Scott was tasked with protecting a one-run lead in the ninth inning and couldn't get the job done. He entered Tuesday with a four-inning scoreless streak, but much of that had come in lower-leverage spots after his struggles in late August and early September. Over his last 10 outings, the southpaw has allowed nine runs with a 7:6 K:BB in 7.1 innings while converting just two of five save chances. He's now at a 4.91 ERA, 1.27 WHIP and 57:17 K:BB across 55 innings while converting 22 of 32 save opportunities. Manager Dave Roberts hasn't made a change at the back of his bullpen yet, but if Scott is removed from the closer role, Alex Vesia could get more save chances.

Santana allowed a walk in a scoreless inning Tuesday while earning a save over the Reds. He struck out one batter.

Santana forced a game-ending double play after issuing a one-out walk to Elly De La Cruz. It was Santana's 15th save in 17 chances, and he's now converted nine straight dating back to early August. During that stretch, he's produced a stellar 1.00 ERA over 18 frames. Santana now owns a 2.15 ERA with a 56:17 K:BB through 67 innings for the year.

Palencia (shoulder) will be activated Tuesday or Wednesday, Mike McGraw of the Chicago Daily Herald reports.

The Cubs want to get their closer on the mound as the regular season winds down to see if he is ready for the postseason. The 25-year-old has made one appearance during his rehab assignment, which commenced Sept. 20 in a game where he allowed one run in 0.2 innings.

The Brewers are hopeful Megill (elbow) will be activated from the 15-day injured list Sunday, Adam McCalvy of MLB.com reports.

Megill has not had a smooth recovery from a right flexor strain that's kept him out all of September. He'll try throwing off the mound again Tuesday, though, with a 25-to-30 pitch, two "up" bullpen session. If that goes well, Megill could make it back for one appearance on the final day of the regular season as he tests out his readiness for the playoffs.

The Nationals recalled Ribalta from Triple-A Rochester on Tuesday.

Ribalta has made 20 relief appearances for Washington this season, collecting a 6.56 ERA and 24:15 K:BB over 23.1 innings. He'll give the team a fresh bullpen arm for the final week.

The Nationals recalled Fernandez from Triple-A Rochester on Tuesday.

Fernandez was claimed off waivers in August and will now receive his first major-league opportunity since joining the Nationals organization. The 29-year-old has spent most of the season at the Triple-A level, where he's held a 4.17 ERA and 67:18 K:BB over 54 frames.

The Nationals placed Thompson on the 15-day injured list Tuesday with right biceps tendinitis.

The injury will end Thompson's season, though he should have a normal offseason, barring any setbacks. Thompson struggled mightily in 10.2 innings out of the Nationals' bullpen in 2025, finishing with an 11.81 ERA and 11:21 K:BB.

The Pirates optioned Sisk to Triple-A Indianapolis on Tuesday.

He's being replaced on the roster by Hunter Barco. Sisk has made 19 relief appearances in the majors this season between the Royals and Pirates, posting a 3.57 ERA and 25:10 K:BB over 17.2 frames.

Atlanta optioned Wiles to Triple-A Gwinnett on Tuesday.

He's clearing out to make room on the roster for waiver claim Joel Payamps, who officially reported to the team Tuesday. Wiles' stint in the majors lasted one week and he did not make an appearance.