John Frank "Buck" Freeman (October 30, 1871 – June 25, 1949) was an American right fielder in Major League Baseball at the turn of the 20th century.

A native of Catasauqua, Pennsylvania, Freeman showed talent as a pitcher from a young age; he later received advice from early African-American player Bud Fowler to practice hitting more.

[2] Freeman played in a further four games during the season, finishing up with a 3–2 record and an earned run average of 3.89 in 44 innings pitched, while striking out 28 but also walking 33.

Freeman returned to the Washington roster in September of the 1898 season, when Arthur Irwin took over as manager;[3] the team was now known as the Senators and played in the National League.

The 25 home runs that Freeman recorded for the 1899 Senators were truly remarkable by the standards of the time;[4] the second highest total that year was 12 by Bobby Wallace of St. Louis.

Freeman's tally was not surpassed until 1919, when Babe Ruth hit 29 home runs with the Boston Red Sox.

Freeman's contract was sold to Boston in February 1900, as Washington owner J. Earl Wagner correctly foresaw that the National League would be reduced in size.

Freeman went on to finish the 1907 season with the Minneapolis Millers of the American Association, recording an average of .335 and hitting 18 home runs in 142 games played.