Manager Dave Roberts said Baez was scheduled to pitch again Saturday night, his first back-to-back assignment, and "if all goes well, we expect him in Chicago at some point."
The Dodgers play the Cubs three times over four days, beginning Monday.
Roberts said Scott Kazmir, on the disabled list with an unspecified left hip injury, threw 45 pitches over three innings on Saturday at Camelback Ranch-Glendale in Arizona in either a simulated or camp game.
"He says he feels good," said Roberts. "He'll throw a bullpen in a couple days. He's progressing. How rapidly, I don't know. His return, I don't know."
Roberts said Rich Hill, on the disabled list with a finger blister, will continue playing catch to keep his shoulder loose, but will hold off on a bullpen session that might irritate the blister.
Ken Gurnick has covered the Dodgers since 1989, and for MLB.com since 2001.