On July 5, 1977, Mike Tyson's fourth inning grand slam led the Cardinals to a 7-3 winner over the Pirates at Three Rivers Stadium in Pittsburgh. Tyson was hardly known for his power, he hit just 27 home runs in his big league career and only one of them was a grand slam. The big blast opened up a 5-0 lead over the Buccos before Al Oliver closed the gap with a three run bomb off of Bob Forsch in the fifth. It was all the Pirates had in them as Forsch settled down and Ted Simmons added two more Redbird runs to the board with a bomb of his own in the eighth. Forsch went onto pick up his third complete game victory, along with his tenth win. By season's end Forsch had eight complete games under his belt and led the team with 20 wins.
Check out the box score: http://www.baseball-reference.com/boxes/PIT/PIT197707050.shtml