Mike Nadel: Hurry up, Cubs, and sign Zambrano while he's cheap

Yes, Carlos Zambrano is acting Cra-Z again. No, Cubbieland need not crank up the Z-Meter to Orange Alert this time.

The tempestuous right-hander is not head-butting his catcher, challenging an opponent to a pistol duel at 10 paces or spending so much time on the Internet reading my blog that he's giving himself carpal tunnel syndrome.