Jocko Flynn, one-year wonder

Looked up Cap Anson and the 1886 Chicago White Stockings and I saw strange statistic for Jocko Flynn, a right-handed pitcher. Flynn was 21 when he made his first start for the White Stockings on May 1, 1886. Flynn started 29 games that year and completed 28. His record was 23-6. He pitched 257 innings in his only year in the major leagues. One year. Wikipedia says Flynn developed hip problems and could not pitch after that initial stint with the club.

Even more amazing, in two minor league seasons, Flynn had a 0.85 earned run average. No telling how good he might have been had he been able to stay healthy.

Flynn was 5-6 ½ and weighed 143 pounds. Teammate Cap Anson was 6 feet tall and weighed 227 pounds. Most other White Stockings players were 5-10 or 5-11, two and three inches taller than the average baseball player of the late 19th century.

Statistics from baseball-almanac.com.