Singer will pitch out of the bullpen during the American League Wild Card Round, Anne Rogers of MLB.com reports.

Singer pitched a career-high 179.2 innings this year for Kansas City, logging a 3.71 ERA, 1.27 WHIP and 170 strikeouts. Cole Ragans, Seth Lugo and Michael Wacha line up as Kansas City's starting rotation in the wild-card round.

Knack is set to follow Anthony Banda for Sunday's game in Colorado, Bill Plunkett of The Orange County Register reports.

Plunkett notes that this could foreshadow how the Dodgers will use Knack in the postseason. The rookie right-hander has a 5.14 ERA, 1.24 WHIP and 23 strikeouts in 21 innings over his last five appearances and will make his final trip to the mound of the regular season in Coors Field.

McDonald was recalled from Triple-A Sacramento on Sunday.

The Giants are short on fresh arms for the final game of the regular season, so McDonald could make his big-league debut in relief of Hayden Birdsong. McDonald, a 23-year-old righty with decent stuff, logged 78.1 innings across High-A, Double-A and Triple-A this season.

Gallen expects to be available out of the bullpen Sunday against the Padres, Steve Gilbert of MLB.com reports.

He did not throw his usual between-start bullpen session over the weekend in case he was needed on the final day of the regular season. Arizona gets into the postseason with a win Sunday and losses by the Mets and Atlanta, so Gallen could end up appearing and qualifying for a win or save in relief of Brandon Pfaadt.

Wrobleski was optioned to Triple-A Oklahoma City on Sunday.

He picked up a four-inning save Saturday, so Wrobleski won't be available to pitch for a couple days. The 24-year-old lefty logged a 5.70 ERA, 1.38 WHIP and 26:16 K:BB in 36.1 innings with the big club this season and will retain his prospect eligibility heading into 2025.

Maeda is starting Sunday against the White Sox.

This will be Maeda's first start since July 9. He has been much better out of the bullpen (3.86 ERA, 1.07 WHIP) than in the rotation (7.26 ERA, 1.58 WHIP) this season, but the Tigers will look to him to eat some innings on the final day of the regular season.

Waldron was recalled from Triple-A El Paso on Sunday.

Waldron will serve as fresh arm capable of logging multiple innings of relief Sunday following starter Martin Perez. Waldron, who is known best for his knuckleball, logged a 4.79 ERA, 1.24 WHIP and 130 strikeouts in 142.2 innings through 26 MLB starts this year.

Vasquez was optioned to Triple-A El Paso on Sunday.

Vasquez had arguably his best start of the season Saturday in Arizona, giving up one hit and one walk while striking out four over six scoreless innings. He'll presumably compete for a rotation spot next spring, but it's not clear if he'll have a role on the Padres' postseason roster. Matt Waldron was recalled in a corresponding move.

Penrod was optioned to Triple-A Worcester on Sunday.

The 27-year-old lefty split the majority of his season between Double-A and Triple-A, establishing himself as a fringe prospect despite his age. Control was an issue for Penrod at Triple-A (16.1 percent walk rate), and he walked four batters in four innings while up with the big club.

Priester was recalled from Triple-A Worcester on Sunday ahead of his start against the Rays.

Priester will be making his Red Sox debut, as he last pitched in the majors July 27 as a member of the Pirates before getting traded to Boston two days later for Nick Yorke. Priester gave up eight runs in his first start for Worcester, but he has a 3.75 ERA, 1.06 WHIP and 38 strikeouts in 36 innings over his last eight starts. He'll likely have a chance to compete for a big-league rotation spot in the spring.