John Francis Paciorek is a former baseball player whose remarkable display of skill started and ended in 1963. To be more precise, he played just one match in his major-league career. After the expansion of the rosters in September, he started as the right fielder in the final game of the season for the Houston Colts .45s. He managed to go to the plates five times, and hit three singles and drew two walks, thus scoring four runs. He drove in all three runs of his team. He has a perfect career batting average, with an on-base percentage of 1.000. He also appeared in the pre-season exhibition game in 1964, but, his back injuries made him miss the season, after which he only played minor leagues. He is undoubtedly the exemplary one-hit wonder.