According to CSN Philly, Zambrano suffered a Grade I Lat Strain which will sideline him for at least a month. Zambrano could have opted out of his contract with the Phillies on Monday but he was injured in Saturday's start and landed on the disabled list.
In two starts at Single-A Clearwater, he pitched 10.1 innings without allowing a run and allowed just seven hits while walking four and striking out five batters. In one start at Double-A Reading, he went six innings allowing just one run on three hits while striking out seven and walking three batters. In four starts for Lehigh Valley, Zambrano was 1-0 with a 3.32 ERA and a 1.53 WHIP with 18 strikeouts in 19 innings pitched.
The Phillies did not look like they were rushing Zambrano to the majors even when he was pitching and his 1.53 Triple-A WHIP might lend itself to that.
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