Ronald Roy Stillwell (December 3, 1939 – January 25, 2016) was an American Major League Baseball player who played parts of two seasons for the Washington Senators. A shortstop, he batted and threw right-handed, stood 5 feet 11 inches (1.80 m) tall and weighed 165 pounds (75 kg)..
Born in Los Angeles, Stillwell attended John Burroughs High School in Burbank, California and the University of Southern California, where he co-captained the national champion 1961 USC Trojans varsity baseball team. He was signed by the Senators as an amateur free agent during the 1961 season—the inaugural season of that incarnation of the Senators—and made his big league debut on July 3 against the Boston Red Sox at Griffith Stadium. Starting at shortstop in back-to-back games, both Washington victories, he collected one hit in eight total at bats, a double off Don Schwall. That was Stillwell's only MLB extra-base hit in 38 at bats and 42 plate appearances. He notched three runs batted in.
Stilwell retired after five professional seasons in 1965. He became a teacher, and was baseball coach at Thousand Oaks High School, California Lutheran University and Moorpark College. He died of cancer on January 25, 2016. His son, Kurt, had a nine-season MLB career.