The four established New York (Manhattan) clubs play nine matches between August 30 and October 28. Several other clubs in present New York City play matches against a rival or two. Daily and weekly newspapers cover the game and some matches.
17 October — the Eagle club scores 8 against 2 by Gotham, an extreme example of the main problem with the 21–run rule (revised to nine innings next spring).
At the close of 1856 it was decided that a revision of the rules was necessary, and a meeting of the Knickerbockers was held and a new code established. The outcome of this was the fist actual convention of ball clubs.
“The New York Game rules are modified by a group of 16 clubs who send representatives to meetings to discuss the conduct of the New York Game. The Knickerbocker Club recommends that a winner be declared after seven innings but nine innings are adopted instead upon the motion of Lewis F. Wadsworth. The base paths are fixed by D.L. Adams at 30 yards – the old rule had specified 30 paces and the pitching distance at 15 yards. Team size is set at nine players.” The convention decided not to eliminate bound outs, but did give fly outs more weight by requiring runners to return to their bases after fly outs.