On July 26, 1963, Bob Gibson earned his 12th win of the season with a complete game effort during a 4-1 win over the Cubs at Wrigley Field in Chicago. The hurler allowed just four hits in the contest, and knocked in the first run of the day in the top of the second on a force play. He watched the 1-0 lead disappear in the bottom of the inning when Ernie Banks doubled to leadoff the inning, then came into score on Ken Hubbs single. Gibby gave up just two more hits the rest of the way, while Ken Boyer belted his 13th home run of the season in the sixth. The two run shot by Boyer proved to be all the Birds would need as Gibson took care of business. The win was Gibson's fifth straight, and his 11th during his last 12 decisions. Gibson finished that '63 campaign with 18 wins, which was the same total as fellow starter Ernie Broglio. The club won 93 games, but fell short of winning the pennant by six games. With that said, the 27-year-old Gibson was becoming one of the most dominant pitchers in the game, and there would be several pennants coming his way in the very near future.
Check out the box score here: http://www.baseball-reference.com/boxes/CHN/CHN196307260.shtml