The Chicago Cubs knocked off the San Diego Padres Tuesday by the score of 4-0, two wins in a row in this series for Chicago, the two teams will play the traditional 1:20 p-m play ball at Wrigley Field this afternoon. The Cubs are 36-34. The Iowa Cubs beat Omaha at home in Des Moines 6-4 in a day game Tuesday and improved to 31-41 on the year. They have the day off today.