Nathan "Nate" Berkenstock (September 17, 1832 – February 23, 1900) is believed to be the earliest-born professional baseball player, three years older than the next-"oldest" player, Hall of Famer Harry Wright, who was born in 1835. (Originally thought to have been born in 1831, Berkenstock's grave gives his birth year as 1832; see below.) Berkenstock played in just one pro league game: the game that decided the first professional baseball league championship in the United States, in 1871. He was Jewish.