The First Game Of Baseball Played With Modern Rules Was Played On June 19, 1846

The foundations of modern baseball were laid with the 1845 formulation of the "Knickerbocker Rules," which formalized the game. According to these rules, a runner could not be sent out of play by getting hit with a thrown ball; instead, fielders were required to tag or force the runner, as is done today. It is widely thought that the first competitive game under the new rules was played at Elysian Fields in Hoboken, NJ