Three clubs called the field on the corner of Marcy Avenue and Rutledge Street home; however, the Eckford of Brooklyn were the most famous tenant.
During that two year period, the Eckfords won 22 straight matches which was the longest undefeated and untied streak to date.
[1] From the sports page of Chicago's Daily Inter Ocean newspaper, December 20, 1879, p. 3: "Peter Tostevin, whose name was identified with the early history of the once famous Eckford Club of Brooklyn, N.Y., died in that city Dec. 8, aged 52.
Second, Brooklyn was populous enough to maintain several strong teams and support the construction of two enclosed ballparks during the amateur days when few players migrated to baseball jobs.
For all these reasons, When the NABBP permitted open professionalism in 1869, Eckford and Atlantic among dozens of Brooklyn members were both viable in following that route, and in 1872 they both joined the National Association league for its second season.
"Eckford" was not common as the root of a ballclub name — in contrast to "Athletic", "Atlantic", and "Mutual" — so there must have been little need to distinguish the Brooklyn rendition.
For 1872 Eckford paid the $10 entry fee and assembled a team but it was a woefully weak one that lost all of its 11 games played to July 9, with average score 5-22.
They may have been equals on the field once again, but Eckford went out of business while Atlantic improved its team and moved in to share the Union Grounds with the Mutuals for the last three National Association seasons.