Walter George "Jumbo" Brown (April 30, 1907 – October 2, 1966) was an American professional baseball pitcher who played in Major League Baseball for the Chicago Cubs, Cleveland Indians, New York Yankees, Cincinnati Reds, and New York Giants.

Until Walter Young and Jonathan Broxton made their MLB debuts, Brown was the heaviest player to ever play in the major leagues.

[2] He began playing sandlot ball in Brockton, Massachusetts, where he was discovered by a scout for the Chicago Cubs, who signed him.

[3][4] Brown made two appearances for the Cubs on a trial basis, playing his first game on August 26, 1925.

[8] His weight continued to fluctuate throughout his career, reaching a reported high of 295 pounds (134 kg).

[8] The New York Yankees purchased Brown's contract before the 1931 season and assigned him to the Jersey City Skeeters of the International League.

[17] The Yankees optioned Brown to the Hollywood Stars of the Pacific Coast League at the end of August.

[27] The Reds sold Brown and Phil Weintraub to Jersey City, then owned by the New York Giants, in July.

[38] Brown reported to spring training with Columbus in March 1942,[39] but retired from professional baseball in April.

[40] He finished his career with a 33–31 won-lost record, a 4.07 ERA, and 28 saves at the major league level.

[3] In his later life, Brown spent time living in Providence, Rhode Island, before returning to Freeport.