Tully Frederick "Topsy" Hartsel (June 26, 1874 – October 14, 1944) was an American 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 Philadelphia Athletics (1902–11), with whom he won the World Series in 1910.

Hartsel spent the first three years of his professional career as a part-time outfielder for the Colonels and Reds.

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.

This biographical article relating to an American baseball outfielder born in the 1870s is a stub.