The Chicago White Stockings beat New York Mutuals at Dexter Park for the unofficial national championship

1870 – The Chicago White Stockings host the New York Mutuals at Dexter Park with the unofficial national championship at stake with 6,000 fans on hand. With his team ahead, 13 – 12, and having just walked the bases loaded, Mutuals pitcher Rynie Wolters walks off the mound, claiming the umpire is biased. The game ends with the score reverting to the last completed inning, giving Chicago a 7 – 5 win although the Mutuals continue to proclaim themselves the champs.