September 5, 1984 Tigers 1, Orioles 0 (89-51)
In the bottom of the first inning, Alan Trammell scored on a throwing error by Cal Ripken. Little did either team know that would be the last of the scoring for the day.
Orioles starter Mike Flanagan pitched a fine game, going the distance and giving up only six hits and one unearned run. Unfortunately for him, Juan Berenguer was just a little bit better, as he pitched 7 1/3 innings of two hit shutout ball. Willie Hernandez came in to finish the game after that, and he earned his twenty eighth save in the process.
The Jays lost, so the Tigers increased their lead to 8 1/2 games. With a day off before facing the Blue Jays in three game series, the Tigers magic number stood at fifteen.