Detroit beats Milwaukee, 9 – 5, in the first game of a doubleheader split, making Tigers manager Sparky Anderson the first manager ever to win 600 games in each league. The Brewers win game 2, 3 – 1.

On June 29, 1986 Detroit beats Milwaukee, 9 – 5, in the first game of a doubleheader split, making Tigers manager Sparky Anderson the first manager ever to win 600 games in each league. The Brewers win game 2, 3 – 1.

Source
Baseball Reference June 29