3rd The annual NL meeting convenes in Buffalo. A new Cincinnati club headed by Justus Thorner and O. P. Caylor is admitted to membership.
4th NL owners again vote to retain the 50¢ minimum admission charge despite opposition from Troy and Buffalo.
The following rule changes are made:
- the number of balls for a walk is reduced from 9 to 8.
- the catcher must catch the 3rd strike on the ﬂy to put the batter out (the first bounce no longer counting).
- the final outs of the last half inning need no longer be completed if the team batting last is already ahead.
5th The NL adopts a rule allowing a club to suspend a player for the remainder of one season and the entire following season for drunkenness or insubordination.
6th The American College Baseball Association is founded in Springfield, MA. The six schools forming the group are Harvard, Yale, Princeton, Amherst, Dartmouth, and Brown, and they vote to exclude professional players from their teams. Yale, with the best team, will withdraw from the Association and only five teams will compete for the pennant in 1880. Princeton will win the 1880 season with a 6–2 record, though Yale will go 7–1. Yale will rejoin in 1881 and go 7–3, tops of the 6.
18thThe American College Base Ball Association is founded in Springfield, MA, at a meeting attended by 6 prominent eastern colleges.
21st The Hop Bitters of Rochester, the first North American team to play in Cuba, beat a local team 21–7 in Havana before a crowd of 5,000.