William Grassam (20 November 1878 â 1943) was a Scottish footballer who played as a forward.
Grassam played for Scottish Junior Football Association sides Redcliffe Thistle and Maryhill before joining English side Burslem Port Vale in July 1899. He scored three goals in the opening five Second Division fixtures of the 1899âÂÂ1900 campaign, and finished the season with ten goals in 41 games. In the summer of 1900 he moved on to West Ham United of the Southern League. On 1 September 1900, he became the first West Ham player to score a hat-trick, when he scored four goals on his debut against Gravesend United. The club finished sixth in 1900âÂÂ01. He finished as the club's joint-top scorer (with George Ratcliffe) in 1901âÂÂ02 with 10 goals. After West Ham finished tenth in 1902âÂÂ03, Grassam returned to Scotland with Celtic.
In September 1903, he returned to England to join Manchester United. He scored 11 goals in 23 games in his first season with the club, becoming joint-top scorer in the league (with Billy Griffiths and Tommy Arkesden). However, he fell out of favour the following season, contributing just two goals in six league games, before moving on to Leyton in July 1905. He rejoined West Ham later that year, where he built up a solid partnership with Harry Stapley. The Boleyn Ground club finished 11th in 1905âÂÂ06, 5th in 1906âÂÂ07, 10th in 1907âÂÂ08, 17th in 1908âÂÂ09, and 9th in 1909âÂÂ10. Having lost his first-team place to Danny Shea, Grassam moved on to league rivals Brentford in 1910. He was the second-highest goal scorer of the period for the "Hammers" behind Shea before the club joined the Football League in 1919.