Jack Houston Rothrock (March 14, 1905 – February 2, 1980) was an American professional baseball utility player in Major League Baseball who played with four teams between the 1925 and 1937 seasons.

He entered the majors in 1925 with the Boston Red Sox, playing with them through the 1932 midseason before joining the Chicago White Sox (1932), St. Louis Cardinals (1934–1935) and Philadelphia Athletics (1935, 1937).

In 1927 he was considered in the American League MVP vote, then in 1928 played all nine positions, plus pinch-hitting and pinch-running duties.

He became just the second American League player ever to play all nine positions in one season.

His most productive season came with the 1934 National League champions Cardinals, when he posted career-numbers in home runs (11), runs (106), and RBI (72), while hitting .284 with a .336 OBP and leading the league with 154 games played.