On September 21, 1896, Connie Mack announced his intention to leave the Pirates in order to manage the minor-league Milwaukee Brewers of the Western League. Mack thus retired as a full-time player to accept his new role, which included a $3,000 a year salary and 25% ownership of the club. He managed the Brewers for four seasons from 1897 to 1900, their best year coming in 1900, when they finished second.
Connie Mack baseball card, 1887 (Wikimedia Commons)