The invasion of red-shirted fans began Thursday night at Wrigley Field, where the Cubs knocked off the Cardinals 3-0 in the opener of a four-game series. Edwin Jackson pitched seven shutout innings, Anthony Rizzo drove in three runs and the Cubs turned in a strong defensive effort before a crowd of 35,379. Jackson, who gave up three hits, has won five of his last seven starts and has allowed one or no runs in four of them. He's 3-0 with a 1.93 ERA in his last three outings. "Like I (said) earlier in the season when I was struggling, it's a crazy game and you just have to keep throwing," Jackson said. "Just have to have confidence things will change and the ball will roll your way."