January 3, 1899, Doc Adams passed away at the age of 85 at his home in New Haven, Connecticut. In his years playing base ball (1845-1862) in New York City with the Knickerbocker Base Ball Club), he created and developed the shortstop position (1849/50), made all the balls and supervised the manufacture of all the bats. In 1857, in his ‘Laws of Base Ball’, he set the bases at 90 feet, and proposed nine innings/nine players per side and more.

Dr. Daniel Lucius ‘Doc’ Adams Obituary, New Haven Morning Journal & Courier, January 5, 1899

You can find more of Doc’s obituaries here.