Zambrano off DL, to face Nationals
Zambrano has not pitched for the Cubs since Aug. 1 at Florida because of back spasms. He made one rehab start with Single-A Peoria, throwing 5.0 scoreless innings.
Zambrano is 7-4 with a 3.35 ERA in 20 starts for the Cubs, and he is unbeaten in his last five starts, going 3-0 with a 2.93 ERA.
In a corresponding move, the Cubs optioned right-handed pitcher Esmailin Caridad to Triple-A Iowa.