Otto Charles "Pep" Deininger (October 10, 1877 – September 25, 1950) was a pitcher/center fielder in Major League Baseball who played for two different teams between 1902 and 1909. Listed at 5' 8½" Weight: 180 lb., Deininger batted and threw left-handed. He was born in Wasseralfingen, Germany.Deininger started his majors career in 1902 as a pitcher for the Boston Americans.