プレイヤーズ・リーグ
In late 1889, Hanlon was one of the early supporters and organizers of the new Players' League. He served as player-manager for the Pittsburgh Burghers during the 1890 season. In Hanlon's first full season as a manager, his team compiled a 60–68 record and finished in sixth place in the Players' League. Hanlon put in a solid performance as a player in 1890, posting a .278 batting average and a career-high .389 on-base percentage fueled by a career-high 80 bases on balls. He also led the Players' League with 291 outfield putouts, posted a 2.59 range factor (3rd highest among the league's outfielders), and ranked fourth in the league with 65 stolen bases.