The Reds recalled Richardson from Triple-A Louisville on Wednesday.

Richardson will provide the Reds with a fresh arm after they went with a bullpen game in Tuesday's 12-9 loss to the Blue Jays. He's collected a 3.93 ERA and 30:20 K:BB over 36.2 frames during his time with the big club this season.

The Reds optioned Sanmartin to Triple-A Louisville on Wednesday.

Sanmartin gave the Reds 1.2 innings out of the bullpen in his lone day with the team, giving up one unearned run in Tuesday's loss to the Blue Jays. Lyon Richardson was recalled from Triple-A to take Sanmartin's spot on the active roster and in the bullpen.

Santana gave up one run on one hit and one walk in the ninth inning Tuesday to record his 12th save of the season in a 9-7 win over the Dodgers.

The right-hander had plenty of cushion, allowing him to convert his sixth straight save chance. Since a shaky five-run outing at Coors Field in his first appearance following David Bednar's trade to the Yankees, Santana has looked the part of the Pirates' closer, posting a 2.92 ERA, 0.97 WHIP and 8:4 K:BB over his last 12.1 innings.

The Mets recalled Herget from Triple-A Syracuse on Tuesday.

Herget was touched up for three runs over 2.1 innings in Tuesday's win over the Tigers. The righty reliever will operate in a low-leverage role in the Mets' bullpen down the stretch.

Chandler (2-0) picked up the win Tuesday over the Dodgers, giving up three runs on six hits over four relief innings in a 9-7 victory. He struck out three without walking a batter.

Entering the game in the third inning to piggyback Carmen Mlodzinski once again, Chandler racked up an impressive 22 called or swinging strikes on only 50 pitches (34 total strikes), but he also served up his first two homers in the majors, getting taken deep by Shohei Ohtani and Andy Pages. Through his first three appearances with the Pirates, Chandler has lasted exactly four innings each time, producing a 2.25 ERA, 0.83 WHIP and 9:1 K:BB. If the Bucs maintain that piggyback arrangement, the duo will be lined up to take the mound again this weekend at home against the Brewers -- setting up a potential marquee matchup of flame-throwing rookies between Chandler and Jacob Misiorowski.

Ferrer earned another save in Tuesday's 5-2 win over the Marlins, tossing a perfect frame while striking out one.

Ferrer closed the door on the Marlins for a second straight day and now has converted a save in five of his last seven appearances. He's slid into the closer role admirably since the departure of Kyle Finnegan at the trade deadline, tossing 13.1 scoreless frames since Aug. 3 while posting a 12:1 K:BB.

Palencia allowed two hits and no walks in scoreless ninth inning for the save Tuesday against Atlanta, striking out one.

Palencia has now yielded multiple hits in three of his last four outings, but he was able to hang on for his 22nd save of the season Tuesday. The right-hander has certainly been shaky of late, logging a 4.76 ERA and 1.85 WHIP over his last 11.1 innings since the start of August, though he remains Chicago's clear-cut closer. For the year, Palencia owns a 2.16 ERA and 1.10 WHIP while successfully converting all but two of his save opportunities across 50 innings.

Rashi allowed one run on three hits and struck out two without walking a batter over two innings to earn the save in Tuesday's 5-3 win over the Rangers.

Rashi has collected a multi-inning save in both of his first two big-league appearances. Most of Arizona's high-leverage relievers had pitched in Monday's extra-inning loss, and Jalen Beeks was deployed in the seventh inning to relieve starter Nabil Crismatt, leaving Rashi to collect this save. It's unclear if his early success (one run allowed over five innings) will position the 29-year-old Rashi for more save chances, especially since he provides a multi-inning option out of the bullpen. However, anything is possible in the Diamondbacks' closer situation, which continues to operate as a large committee.

Crismatt allowed two runs on seven hits and a walk while striking out three over 6.1 innings in a no-decision versus the Rangers on Tuesday.

Crismatt has won his last three outings, and this one was his first quality start. The 30-year-old has stepped up effectively since entering Arizona's rotation in mid-August, delivering a 2.14 ERA, 1.33 WHIP and 14:6 K:BB across 21 innings through four appearances (three starts). Crismatt is tentatively projected to make his next start at San Francisco next week, assuming Anthony DeSclafani (thumb) isn't activated from the injured list.

Walker picked up the save Tuesday against the Rockies, striking out one in a clean ninth inning.

Walker secured his 13th save of the season, and he's quickly taken over as the Giants' top closer following the season-ending injury to Randy Rodriguez (elbow). Walker has successfully converted each of his last three save opportunities, and he's conceded just one earned run over his last 10.2 innings since the start of August. The right-hander also has an 11:1 K:BB during that stretch, and he should be rostered in the majority of fantasy leagues.