Irving John Medlinger (June 18, 1927 – September 3, 1975) was a professional baseball player. He was a left-handed pitcher over parts of two seasons (1949, 1951) with the St. Louis Browns. For his career, he did not record a decision, with a 13.83 earned run average, and 9 strikeouts in 13.2 innings pitched.
He was born in Chicago. He was one of two people killed aboard a Piper PA-24 Comanche destroyed on September 3, 1975, while attempting a crash-landing near Wheeling, Illinois, after its engine failed. He died at the age of 48.