Cubs manager Dale Sveum said Soto did everything on Sunday but run 100 percent.
"Everything's going well," Sveum said Monday. "He'll probably be ready to go by [Wednesday], but we'll put him through a few more tests. Everything's going good, he's not feeling anything now in anything he does. That's a good thing. Sometimes groin [injuries] can hang on for a long time."
Soto is the Cubs' regular catcher and his being sidelined has given the team a chance to look at the candidates for backup, which include Welington Castillo, Steve Clevenger and Jason Jaramillo.