Zambrano leaves game with arm cramp

Cubs ace Carlos Zambrano left today's opener against the Milwaukee Brewers in the seventh inning with a cramp in his right forearm, right after making a pickoff throw to second base.

Milwaukee's Bill Hall hit a one-out double in the seventh, moments after Zambrano made a catch of Ryan Braun's popup near the mound and had his feet cut out from under him by sliding Cubs' first baseman Derrek Lee.

Zambrano was not injured on that play. But minutes later, he picked Hall off second base and then grabbed at his right arm. A trainer came to the mound and minutes later, Carlos Marmol replaced Zambrano.