Frederick Charles Erentz (10 June 1870 – 6 April 1938) was a Scottish footballer who played at half-back and full-back for Dundee Our Boys and Newton Heath in the 1880s, 1890s and early 1900s.

[1] Originally a half-back, Erentz was signed by Newton Heath in June 1892 in preparation for their first season in The Football League.

[3] Erentz was effectively ever-present at left-back over his next eight seasons at the club, and even rejected a sizeable contract offer from Tottenham Hotspur, where his brother Harry played at right-back.

[4] He was the first player to amass 100 appearances for Newton Heath, a feat he achieved on 14 December 1895 in a league match against Notts County.

[1] With 310 matches he was club's record appearance maker until 21 November 1914, when George Wall played 311th of his 319 games for Manchester United.