Tully Frederick "Topsy" Hartsel (June 26, 1874 – October 14, 1944) was an outfielder in Major League Baseball. He was born in Polk, Ohio, and played for the Louisville Colonels (1898–99), Cincinnati Reds (1900), Chicago Orphans (1901) and the Philadelphia Athletics (1902–11), with whom he won the World Series in 1910. On September 10, 1901, he established the record for putouts by a left fielder in a nine-inning game, with 11 against the Brooklyn Superbas.

Hartsel died in Toledo, Ohio, on October 14, 1944.