John Francis Ryan (May 5, 1905 – September 2, 1967) was a reserve outfielder in Major League Baseball who played briefly for the Boston Red Sox during the 1929 season.
Listed at 6 ft 0 in (1.83 m), 185 lb., Ryan batted and threw right-handed.
The team finished last with a 58–96 record and only 394,620 fans came to see them play at Fenway Park that season.
Ryan appeared in two games and went hitless in three at-bats, as he did not commit error in his only fielding chance.
This biographical article relating to an American baseball outfielder born in the 1900s is a stub.