Mazur is slated to start Tuesday's game against the Nationals in Miami.

Mazur had initially been lined up to start this past Sunday's series finale versus the Phillies, but Miami ended up going with an impromptu bullpen game led off by right-hander Tyler Phillips. Since the Marlins were able to stay away from Mazur in relief that day, he'll end up taking the hill for Tuesday's contest. Through his first three starts with Miami this season, Mazur has gone 0-2 with a 5.74 ERA, 1.53 WHIP and 12:5 K:BB in 15.2 innings.

Soroka (shoulder) is scheduled for a multi-inning rehab outing with Triple-A Iowa on Wednesday, and he could rejoin the Cubs soon after that, Jordan Bastian of MLB.com reports.

Soroka has been out since his first and only appearance for the Cubs back on Aug. 4 after he was acquired from the Nationals prior to the trade deadline. The veteran has been building up in a throwing program as he recovers from a strain to his right shoulder, and the rehab appearance may be his last step in the process. The Cubs also could be grooming Soroka for a long-relief role, as the rotation currently includes Shota Imanaga, Cade Horton, Matthew Boyd and Colin Rea, with Jameson Taillon (groin) set to return from the injured list Wednesday. Soroka's best chance at starting would likely be bumping Rea as the No. 5 starter at some point.

Assad is expected to move to the bullpen later this week with Jameson Taillon (groin) set to return from the 15-day injured list to start Wednesday's game in Atlanta, Jordan Bastian of MLB.com reports.

Assad has made five starts for the Cubs this season after recovering from a strained oblique, turning in a 4.62 ERA and 1.26 WHIP across 25.1 innings. However, Taillon's imminent return leaves Chicago with a full rotation that also includes Shota Imanaga, Cade Horton, Matthew Boyd and Colin Rea. Assad pitched well in a swingman role back in 2023, when he compiled a 3.05 ERA and 1.23 WHIP over 109.1 innings across 10 starts and 22 relief appearances. The righty will likely once again give the Cubs some length out of the bullpen, and he's capable of making a spot start if needed.

Eagen has a 3.77 ERA, 1.33 WHIP and 16:9 K:BB in 14.1 innings across three starts for Double-A Amarillo.

Eagen, a third-round pick in 2024, logged a 2.49 ERA, 1.06 WHIP and 132:41 K:BB in 97.2 innings for High-A Hillsboro before getting promoted to Double-A on Aug. 19. He capped his run at High-A in impressive fashion, striking out 21 over 13 scoreless innings in his final two starts for the Hops. His performance at Double-A has been uneven, and his walk issues from earlier in the year have popped back up. The 6-foot-4 righty works in the low 90s with his four-seamer, but the pitch has excellent movement and plays better than its velocity. Eagen's low-80s curveball is his top put-away pitch, and he'll mix in a solid slider and seldom-used changeup. Eagen is up to 112 total innings in what has been a highly-successful debut season.

Montas will undergo Tommy John surgery on his right elbow Tuesday, Jon Heyman of the New York Post reports.

A full UCL repair had been considered likely, and now it's official. The operation will likely sideline Montas until the 2027 campaign. Montas proved to be a disastrous investment for the Mets, posting a 6.28 ERA in seven starts and two relief appearances, and he will now undoubtedly exercise a $17 million player option for 2026.

Doyle was promoted from Single-A Palm Beach to Double-A Springfield on Tuesday.

Doyle made his professional debut with Palm Beach this past weekend, allowing one run while striking out three over 1.2 frames. Palm Beach's season is now over, but the fifth overall pick in the 2025 First-Year Player Draft will continue pitching at the Double-A level as he gets his feet wet in pro ball.

Mikolas did not factor into the decision Monday, allowing two runs on four hits and a walk over five-plus innings against Seattle. He struck out two.

The veteran starter held Seattle scoreless through five innings before running into trouble in the sixth frame, allowing two baserunners without recording an out before Gordon Graceffo came on and let both inherited runners -- plus two more -- cross the plate. While the season has been underwhelming overall for Mikolas, he's pieced together a solid stretch lately, logging a 2.25 ERA and 1.00 WHIP over 16 innings across his three most recent starts.

Lodolo did not factor into the decision Monday, allowing two hits and a walk over five scoreless innings against the Padres. He struck out two.

Lodolo returned from an illness that sidelined him for a start and turned in a sharp five-inning performance, though the Reds' bullpen gave away the lead and left him with a no-decision. The left-hander has quietly been excellent this season, posting a 3.10 ERA and 1.03 WHIP over 139.1 innings in 25 starts.

Darvish did not factor into the decision Monday, allowing three runs on six hits and no walks over 5.2 innings against the Reds. He struck out seven.

Darvish surrendered a leadoff homer to TJ Friedl but settled in to grind out 5.2 serviceable innings, keeping the Padres in a game they ultimately won in 10 innings. It's been a challenging season for the veteran right-hander, who didn't debut until July 7 due to an elbow injury. Through 12 starts, he owns a 5.65 ERA and 1.17 WHIP across 57.1 innings as San Diego hopes he can find his form heading into the postseason.

Dollander allowed one run on one hit and two walks while striking out five over five innings in a no-decision versus the Dodgers on Monday.

Dollander did his part, but the Rockies got no-hit for the first eight innings of the game. They were able to scrape together a run to keep Dollander from taking the loss, and it's encouraging he pitched well after allowing 10 runs over 9.1 innings across his first two career starts against the Dodgers. Despite this positive step forward, he still has a 6.52 ERA, 1.55 WHIP and 82:49 K:BB through 98 innings over 21 starts this season. The rookie right-hander's next start is projected to be in San Diego this weekend.