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' 8+1⁄2" Weight: 180 lb., Deininger batted and threw left-handed. He was born in Wasseralfingen, Germany. In a three-season career, Deininger posted a .263 batting average (46-for-175) with 16 RBI and 22 runs, including 10 doubles, one triple, and five stolen bases without home runs. Deininger died in Boston, Massachusetts, at age 72.