© 2013 MLB Advanced Media, L.P. All rights reserved.

8/27/2013 10:14 P.M. ET

Cubs don't expect many moves for September callups

LOS ANGELES -- The Cubs won't add many players when rosters expand Sunday.

Third baseman Luis Valbuena, who began his rehab assignment Tuesday for a right oblique strain in Mesa, Ariz., will be added after Sept. 1, as well as outfielder Ryan Sweeney, who has been on the disabled list with a fractured left rib.

Cubs manager Dale Sveum said he's talked to general manager Jed Hoyer about who to add. The Cubs' 40-man roster is full, which could impact their decisions.

"We'll just fill what we need," Sveum said. "We won't have any extra things going on."

Hitting well, Rizzo stays away from LA's Kershaw

LOS ANGELES -- Anthony Rizzo is looking much better at the plate, which is why Cubs manager Dale Sveum didn't want the first baseman to get out of whack Tuesday against Dodgers starter Clayton Kershaw.

"It's just a good day," Sveum said of giving Rizzo a breather. "He's swinging the bat much better now. I want to give him a few days off here and there, and this was a good one to give him off."

Kershaw entered his start holding left-handed hitters to a .148 batting average.

"He's the best in the game," Rizzo said of the Dodgers lefty. "It'd be kind of fun to face him. It's a good day to take off. I get the day off today, play [Wednesday] and a day off the next day, so it's a little blow."

Right-handers aren't having much luck against Kershaw, either, batting .191 entering the night.

"He's the best in the game, he's the best left-handed pitching in the game," Rizzo said. "It's someone I'd like to face. I've faced him before. I'll just watch how he pitches, and one day I'm going to be facing him and I'll be ready for it."

Extra bases

• Double-A Tennessee is headed to the playoffs for the fourth time in the last five years after winning the Southern League North Division second half with a victory Monday against Mobile. Matt Loosen threw seven shutout innings and Javier Baez hit his 18th home run to help Tennessee beat Mobile, 6-0, and clinch the title.

The Smokies will start the best-of-five North Division Championship Series on Sept. 5 against Birmingham, a White Sox affiliate. The first two games will be held in Regions Field in Birmingham, Ala., with the final three being held at Smokies Park.

Baez, ranked No. 1 among Cubs prospects on MLB.com's top 20 list, homered for the fourth time in his last six games Monday and finished with four RBIs. He entered Tuesday batting .390 this month.

Both Baez and Loosen are among the Cubs contingent headed to the Arizona Fall League.

Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.