Ulysses Grant Thatcher (February 23, 1877 – March 17, 1936) was an American right-handed pitcher in Major League Baseball. Born in Maytown, Pennsylvania, he pitched in five games for the Brooklyn Superbas during the 1903 and 1904 baseball seasons, making four starts, and acquiring a 4–1 record with a 3.16 earned run average during his appearances. He died at age 59 in Lancaster, Pennsylvania.