He began the year with a 28–3 record, but moved on in midseason to manage another UA team, the Kansas City Cowboys; Fred Dunlap took over in St. Louis, compiling a 66–16 record as the Maroons won the UA pennant in the league's only year of existence.

Sullivan later managed in the minors, including a stint with the Nashville Tigers of the Southern League in 1893.

Also, Sullivan was a great promoter of the game; he would tell stories of baseball's beginnings, and of its many star players.

He authored books detailing these, including a barnstorming trip around the world in 1913–1914 by Comiskey's Chicago White Sox and the New York Giants.

Sullivan died in Washington, D.C. at the age of 78, and is interred at Calvary Catholic Cemetery in Milwaukee, Wisconsin.