Cubs' Anthony Rizzo was expected to come off DL Monday

Chicago Cubs manager John Maddon said he expected first baseman Anthony Rizzo to return to the lineup Monday against the St. Louis Cardinals, but Mother Nature had a different plan.

The Cubs ended up postponing Monday's game "due to the forecast for inclement weather throughout the day and wind chills in the 20s this evening." It will be made up as part of a split doubleheader July 21.

Rizzo was put on the disabled list last week with a stiff lower back that he blamed in part on a hotel room bed in Cincinnati.

Maddon thinks Rizzo looks ready when the team gets back on the field.

"I watched him work out in the gym over there, and he looks fine," Maddon said. "So I try to trust the guys. I do trust the guys. I ask them questions. When the guys are honest with you, it makes the decision-making so much easier. Mind reading is really difficult."

To make room on the roster, the Cubs optioned infielder Efren Navarro to Triple-A Iowa Sunday.