John Albert "Jack" Morrissey (May 2, 1876 – October 30, 1936), nicknamed "King", was an American professional baseball player from Lansing, Michigan who played parts of two season in Major League Baseball for the Cincinnati Reds from 1902 to 1903.

[2][3] The following season, he travelled to Tacoma, Washington to play for the Rabbits of the class "C" New Pacific League.

[2] Morrissey's next recorded playing period began in 1901, when he a member of the Grand Rapids Furniture Makers of the Western Association, a class "A" league that was in operation for one season.

[5] He re-signed with the Reds for the 1903 season, appearing in 29 games, 17 at second base and 8 as an outfielder, before playing final major league contest on July 6.

[2] He died in his hometown of Lansing at the age of 60 on October 30, 1936, and is interred at the city's Mount Hope Cemetery.