William B. Phillips (April 30, 1857 – October 7, 1900), also known as Silver Bill, was a Canadian professional baseball first baseman from the mid-1870s until the late 1880s. From 1879 to 1888, he played for three major league teams; the Cleveland Blues of the National League (NL) from 1879 to 1884, the Brooklyn Grays of the American Association (AA) from 1885 to 1887, and the Kansas City Cowboys of the AA in 1888. A native of Saint John, New Brunswick, Canada, he has the distinction of being the first Canadian to play in the major leagues.