Can we really expect the Cubs rotation to keep this up? All but Zambrano is pitching above their career averages with regards to ERA. Now, I know ERA is not the only tool used to measure pitching performance, but as of today: Zambrano: 4.04 ERA Career: 3.20 ERA Hill: 3.49 ERA Career: 4.40 ERA Lilly: 3.84 ERA Career: 4.52 ERA Marquis: 3.31 ERA Career: 4.42 ERA Marshall: 3.50 ERA Career: 5.02 ERA All but Zambrano are also ahead of their career averages in WHIP as well. Is this information irrelevant, or does it bode well for the Crew in the 2nd half? Cubs currently have 80% of their rotation bettering their career ERA's by .70+. Meanwhile, the Crew has Sheets (.58 under career ERA) and Vargas (.55 under career ERA) ahead of their career norms, while Suppan, Bush, and Capuano are all below their career averages.