Cubs starter Carlos Zambrano has been warned by manager Mike Quade about breaking bats. After striking out in his third at-bat against the Astros on Tuesday, Zambrano broke a bat over his knee. With three-fifths of Chicago's rotation finding its way to the disabled list at various times this season, the last thing Quade wants to see is another injured pitcher. "I told him next time you're frustrated, come up and whack me upside the head with the bat," Quade said. "We can survive if I'm injured, but we don't need him hurting himself. "Everybody focuses on Z, but players snap and players do stuff that irritate you and only because of the possibility of injury."