There are several missing players who may have been found, but then there isn't 100% proof.

Here are the ones I know about.

Edward P Beaven 1871

known as E P Beavens and Edward P Beavens. While he was always Beavens in the boxscores with Troy and the Atlantics, when he played locally on Staten Island and in Brooklyn, there were various spellings, mostly Beaven. He played with Staten Island for about 5 years in the mid 1870s. He lived in Brooklyn and usually played a few games there before his season on Staten Island.

Edward P Beavan was listed in the Brooklyn CD from 1867 until around 1910. 1900 census Nov 1845 NY 363 Cumberland, Brooklyn, NY He Died Dec 28, 1920 Brooklyn, NY

William F Bestick 1872

For many years, there was no first name for this player listed. Bestick was the catcher for the Flyaways, a Manhattan based team that played the other teams in the NYC area on the weekends. He was with the Flyaways from around 1867 to 1875. During this period, the only Bestick who was in the Manhattan City directory throughout this period was William Bestick. He was listed in the Manhattan City Directories until the early 1890s. He never appeared again but he was in the 1900 census born May 1855 NY. Looking backwards, in the 1860 census, there was a listing of William F Bestick , 12 years old born NY. His father was James. I finally found the ball player called William Bestick in the Brooklyn Eagle in the mid 1870s

A search of the NYC deaths index found William F Bestick age 62 died July 28, 1911 New York, NY. A search of many NYC newspapers show no death notices or obits or mentions in the sports sections.

From my personal experience, seeing that William Bestick is from Manhattan and there is only one of them living there and he qualifies under my 18 year rule ( Males tended to make their first appearance in the City Directories around age 18).

William F Bestick 1872 born May 1848 New York, NY died July 28, 1911 New York, NY

Eugene T Bagley 1886

Originally called Eugene I Begley. He was signed from the Pennsylvania State Lg, Scranton,Pa He was called Eugene T Bagley in the article.In The Baseball Encyclopedia it said he was born 1863 in Brooklyn, NY. In the 1900 census Eugene Bagley born June 1861 NY living in Queens, NY

There wasn't a city directory for Queens until after he died. No Eugene Bagley appeared in Brooklyn until1892. There was a Eugene Bagley there until 1895. The next we find him is in the 1900 census where he is living with his sister Elizabeth Younger. So we don't know how long he actually lived in Queens or if Eugene of Brooklyn is the same man. At some point it was published that Eugene T Bagley was born June 7, 1861.. On his death Certificate, he was born

b June 14, 1863 NY d Aug 15, 1901 Long Island City, NY. Since his sister was living with him when he died, I believe the birth information. She should know.SL 8/18/86 Eugene T. Bagley, the newcomer of the New York club, is a New Yorker and 23 years old. When a boy, he had great promise as a catcher and played for two years with the Stars of Long Island City. He spent last year with Port Huron and most recently played for Scranton.2 6 89 Sporting Life Baseball in Long Island City The Stars Club has graduated Billy Schriver, Frank Brill, Gene Bagley of Scranton and NY League team

Edward P Brown 1882

This 1882 and 1884 player was called a Chicago amateur when he played for St Louis in 1882. There was only 1 Edward P Brown listed in the Chicago City Directories from 1881 to 1916 and he was the following Edward P Brown born 1858 NY died June 19, 1918 Chicago, Ill. He was not listed in the CDs from 1882 to 1884 which seems to be the extent of his pro career.

Frank Norris Graves 1886

He was born November 2, 1860 in Cincinnati, Ohio. The family moved to New Orleans, La His mother Maria born 1833 Ohio and sister Alberta born 1873 Louisiana were listed with him in the 1880 census. He was a longtime minor league manager. He was managing in Southern California in the early 1900s , which is the last i know of him Bill Carle found a Death Certificate of a Frank Graves who died March 23, 1916 San Jose, Cal. born Ohio with the approximately correct age. No Frank Graves in the San Jose City directory.

John A Greason 1873

Originally listed as Greyson, this player pitched 8 games for the Washington Nationals in 1873. At his debut, the NY Clipper said that Greason was from the Creightons. Research shows that Greason began pitching in Washington DC in October 1868 with the Washington Nationals. Greason was later with the Creightons. In Washington, DC there was only one Greason family, with William the father and the proprietor of the Greason House and the Greason Brothers, George W and John A who took over the Greason House after father William died around 1882. They later ran a saloon. In the 1860 and 1870 census, George W was born 1849 and John A 1850. In the early 1880s, there was a note in the NY Clipper about the death of one of the old Creightons and among his old teammates was John R Greason. I knew this was a typo as only one John Greason was ever listed in Washington DC City Directories and that was John A. It also fits that he was 18 years old when he made his first appearance with the Nationals.

John A Greason was listed in Washington CDs until 1889 and a search of the Washington DC deaths index lead to finding his death notice in the Washington Post and the Evening Star. John A Greason age 37 died July 22 So he was born 1850-1852 Washington DC died July 22, 1889 Washington DC

Albert DeGroot Martin 1872

Al Martin played under Martin and May in the National Association. Not to be confused with Alphonse Case Martin, a famous pitcher of the same era. In the 1880 census he appears as Albert D Martin 30 NY living with his wifes parents at 3 Bank Street, NYC. In 1900 census he was listed as born August 1847 NY at 76 Van Buren, Brooklyn with wife Emily A.He died Mar 17, 1915 Brooklyn, NY at his home 76 Van Buren wife Emily A Peverelly and he was 67 or 68 years old. He worked for the NY Herald for 44 years beginning in 1866. Buried Green-Wood Cemetery Brooklyn 3 21 15. Emily's brother was Charles A Peverelly and according to Peter Morris " The surname Peverelly for Al Martin's wife could be a heck of a clue. Charles Peverelly was a late nineteenth century New York journalist who wrote one of the first important books on the history of baseball and other ball sports, The Book of American Pastimes (1866)."

I found this story. NY Clipper 1 22 76 The local papers, around 10 from NYC and Brooklyn put together the New York Press Club of which they planned to play amateur teams during 1876. I didn't read the story closely so I am assuming this team is composed of employees of the papers. Among the players are Benjamin Laughlin , Albert Martin and Martin A Malone. "Al" Martin is in leftfield." Martin was a second baseman earlier but in 1875 he was an outfielder. I had decided from my research that this was the only Albert Martin who could be the ballplayer and these 2 clues regarding Baseball makes me think he is the guy.

Charles McCullough 1890

Charles McCullough was supposedly born 1867 in Dublin, Ireland. His family moved to Brooklyn, NY before 1880