Corey Patterson also homered for the Cubs.
Leading off the seventh, David Eckstein singled up the middle to break up Rusch's perfect game. Rusch (6-8) allowed two runs on four hits in 7 2-3 innings, and Ryan Dempster got his 23rd save.
Morris (14-7) allowed four runs on nine hits.
Edgar Velazquez hit a two-run homer in the seventh inning to lift Puerto Rico to a 6-4 win over Taiwan. Taiwan led 4-3 in the sixth inning on a three-run shot by Kuo Chun-yu.
Puerto Rico improved to 3-1, as did Japan, which beat Colombia 12-0. Tsutomu Takanezawa and Daisuke Kusano both it three-run homers and Yoshikazu Doi gave up just four hits over seven innings for Japan. Keiji Ikebe also homered for Japan.
Lloyd McClendon was fired Tuesday as manager of the Pittsburgh Pirates with the team only one defeat away from a fifth consecutive losing season. Bench coach Pete Mackanin is set to serve as interim manager for the rest of the season.
The team is expected to begin searching immediately for a replacement for McClendon, a former Pirates player and coach.
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