 Along with two newcomers, seven of the professional teams from 1870 established a new all-professional National Association early in 1871, known today as the first professional sports league.The rival amateur Association declined rapidly and soon left the government of baseball to the sole leadership of the professionals, but the early pros from Troy/Lansingburgh did not survive to take part.During the two NAPBBP season, home games were played at Haymakers' Grounds in Troy, New York.