THE NEWARK EVENING COURIER, New Jersey, Oct. 4, 1867

* First Colored Baseball Championship game
* All Negro players shortly after the Civil War
* Brooklyn Uniques vs. Philadelphia Excelsiors
* Prelude to organized black baseballs leagues 

Established in Newark, New Jersey in June of 1866, the Newark Evening Courier was an enterprising afternoon newspaper with Republican political leanings. By 1867, it had detailed local coverage of municipal proceedings, civic improvements, and Newark's rapidly growing industrial and manufacturing sectors.  
The bottom of page 2 has a discrete but extremely historic report under "Sporting" with text: "The game between the two colored clubs at Brooklyn yesterday, the Excelsiors, of Philadelphia, and the Uniques, of Brooklyn, was terminated on the seventh innings, and was won by the former club by a score of 42 to 37" (see images)
Complete with 4 pages, a larger size issue measuring 25 1/2 x 20 inches, nice condition.

NOTE: This issue comes with a acid-free folder (gratis) for protection

Background: Played on October 3, 1867, at the Satellite Grounds in Williamsburg, Brooklyn, the historic matchup between the Brooklyn Uniques and the Philadelphia Excelsiors was widely promoted by contemporary newspapers as the "First Colored Baseball Championship of the United States," marking the first documented inter-city championship game between elite African American clubs in an enclosed, pay-to-enter ballpark. Played in front of a diverse crowd of thousands of Black and white spectators, the contest showcased both the high caliber of play and the immense commercial appeal of Black ballclubs during the Reconstruction era. In a high-scoring, hard-hitting affair typical of 1860s baseball, the visiting Excelsiors established an early lead and held off a late rally by the Uniques before the game was called due to darkness after seven innings, securing a 42–37 victory. By establishing national bragging rights for Philadelphia and proving that Black baseball could draw paying crowds to major athletic venues, this landmark contest laid the foundational groundwork for the organized Black baseball networks and independent leagues that emerged in the decades following Civil War emancipation.