Dennis Leonard (full name: Dennis Patrick Leonard; no nicknames) played pitcher from 1974 until 1986 for the Kansas City Royals. He played for the Royals from 1974 - 1986. Over 12 seasons, he started 302 games, won 144 games, struck out 1323 batters, and had a 3.70 ERA. Born on May 18, 1951 in Brooklyn, NY, Leonard stands 6' 1" and weighs 190 lb. He attended high school and was drafted by the Kansas City Royals in the 2nd round of the 1972 amateur draft. His debut was on September 4, 1974 and he played his final game on September 27, 1986. Over his career, Leonard made $2,754,762. Common misspellings of his name include Dennis denis Dennis denny dennys Patrick Leonard.