The Cubs placed Horton on the 15-day injured list Saturday, retroactive to Sept. 25, due to a right rib fracture, Jared Wyllys of AllCHGO.com reports.

Horton underwent an MRI earlier this week, which revealed "areas of concern" in his rib area. The Cubs initially planned on having Horton pitch through the issue and make a start during the NL Wild Card Series. However, Horton will require a stint on the injured list due to what's now known to be a fractured rib. The 24-year-old rookie will be eligible for reinstatement Oct. 10, one day before Game 5 of the NLDS. With Horton unavailable, Chicago will have to lean on Shota Imanaga, Matthew Boyd and Jameson Taillon.

Horton (ribs) will throw a bullpen session Sunday, Jesse Rogers of ESPN.com reports.

Horton left his last appearance with back tightness, and an MRI revealed areas of concern in his rib area. Still, the Cubs plan on starting Horton in the NL Wild Card series against San Diego next week, likely in Game 1. Horton's scheduled bullpen session indicates the 24-year-old remains on schedule.

Sasaki recorded the second hold of his career in Friday's 3-2 win over the Mariners, giving up one hit and striking out two in a scoreless seventh inning.

It's been a tough first North American season overall for Sasaki, who has only been healthy enough to throw 36.1 innings, but he appears to be back to 100 percent as he works a high-leverage relief role for the Dodgers headed into the playoffs. The right-hander topped out at 100.1 mph with his fastball Friday, and he's fanned four batters in two shutout innings since being activated from the IL on Sept. 24. If closer Tanner Scott falters in the postseason, Sasaki could find himself in some very high-pressure situations in October.

Sheehan didn't factor into the decision Friday, getting the start but working only one inning in a 3-2 victory over the Mariners. He gave up one unearned run on one hit while striking out three.

The Dodgers will shift the 25-year-old right-hander to the bullpen in the playoffs, and Sheehan looked like he will have no issues adapting to the role, topping out at 97.6 mph with his fastball as he struck out the side around a single, a wild pitch and an error. If this was Sheehan's final appearance of the regular season, he'll put 2025 in the books with a 2.82 ERA, 0.97 WHIP and 89:22 K:BB through 73.1 innings, and he could have a prominent spot in the Dodgers' 2026 rotation plans.

Priester (13-3) took the loss Friday, giving up three runs on nine hits and a walk over five innings as the Brewers fell 3-1 to the Reds. He struck out four.

For the first time since May 13, Priester found his name in the loss column, ending a streak of 12 straight winning decisions. The right-hander is still taking plenty of momentum into the postseason, however -- he hasn't allowed more than three runs in a start since Aug. 10, posting a 2.79 ERA over his last seven trips to the mound and 38.2 innings. With Milwaukee locked into a first-round bye, Priester will close the books on his 2025 regular season having compiled a 3.32 ERA, 1.24 WHIP and 132:50 K:BB in 157.1 innings.

Littell came away with a no-decision in Friday's 3-1 win over the Brewers, allowing one run on three hits and two walks over 4.2 innings. He struck out three.

The right-hander needed 85 pitches (55 strikes) to record 14 outs, and with the Reds in a tight race for a wild-card spot, Littell was lifted from a 1-1 tie after Jackson Chourio reached on an error in the fifth inning. Littell wraps up his 2025 regular season with a career-high 10 wins, along with a 3.81 ERA, 1.10 WHIP and 130:32 K:BB through 186.2 innings split between Cincy and Tampa Bay.

Gallen (13-15) allowed six runs (five earned) on seven hits and three walks while striking out three over 4.1 innings to take the loss versus the Padres on Friday.

A Fernando Tatis grand slam in the fourth inning flipped this game in the Padres' favor. Gallen was pushed back a day after dealing with fatigue stemming from an illness in recent weeks, but his final start of 2025 was reflective of his year as a whole. The right-hander finishes the season at a career-worst 4.83 ERA while adding a 1.26 WHIP and 175:66 K:BB over 192 innings through 33 starts. He also gave up a career-high 31 homers, an area in which the 30-year-old will need to improve if he is to get back on track in 2026.

Darvish (5-5) allowed two runs on six hits and two walks while striking out four over five innings to earn the win Friday over the Diamondbacks.

Darvish allowed solo home runs to Ketel Marte and Jake McCarthy. September saw steady performances from Darvish, who allowed 14 runs (13 earned) over 24.1 innings while adding a 26:4 K:BB across his five starts this month. The right-hander ends the regular season with a 5.38 ERA, 1.18 WHIP and 68:19 K:BB through 72 innings over 15 starts. At this time, it's not clear how he'll be deployed in the postseason.

Marquez (3-16) allowed six runs on five hits and three walks while striking out one over 4.1 innings to take the loss Friday versus the Giants.

Marquez was hit hard early, as Willy Adames hit a two-run home run in the first inning and Heliot Ramos added a three-run blast in the second. Marquez lost eight of his last 11 starts this season and allowed 50 runs (44 earned) over 52.1 innings in that span. Overall, he wasn't much better, finishing 2025 with a 6.70 ERA, 1.71 WHIP and 83:48 K:BB across 126.1 innings over 26 starts. While he avoided a season-ending injury this year, his poor numbers -- the worst he's had in a full season in his career -- will likely lead to a tepid free-agent market for the right-hander.

McDonald (1-0) allowed three runs on five hits and struck out 10 without walking a batter over seven innings to earn the win over the Rockies on Friday.

McDonald gave up a three-run home run to Ezequiel Tovar in the fifth inning but was otherwise quite stingy in a dominant win. This was McDonald's third appearance in the majors this year, and he finished the campaign allowing six runs over 15 innings while adding a 14:2 K:BB. It was a strong showing in his late-season audition, which reflects better than his 5.37 ERA, 1.45 WHIP and 144:62 K:BB over 142.1 innings at Triple-A Sacramento. McDonald has likely done enough to be in the conversation for a big-league rotation spot in the spring.