|Full name||Frederick Charles Erentz|
|Date of birth||March 1870|
|Place of birth||Broughty Ferry, Scotland|
|Date of death||6 April 1938(aged 68)|
|Place of death||Dundee, Scotland|
|Height||5 ft 10.5 in (1.79 m)|
|?–1892||Dundee Our Boys||?||(?)|
|* Senior club appearances and goals counted for the domestic league only.
Born in Broughty Ferry, near Dundee, to a Danish father, Erentz began his football career with Dundee Our Boys. Originally a half back, Erentz was signed by Newton Heath in June 1892 in preparation for their first season in The Football League. He made his Newton Heath debut on 3 September 1892, playing at left half in a 4–3 defeat by Blackburn Rovers. Erentz was almost an ever-present during the 1892–93 season, missing only an away match against Derby County on 11 February 1893.
The following season, Erentz was deployed in several different positions, including right half and both right forward positions, from where he scored his first goal for the club, but he made most of his appearances in 1893–94 at left back. 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.
Erentz retired from football at the end of the 1901–02 season as a result of a knee injury. His final appearance for the club was also the last match the club played as Newton Heath before becoming Manchester United, a 2–1 win over Manchester City in the final of the Manchester Senior Cup on 26 April 1902.
- Barnes, Justyn; Bostock, Adam; Butler, Cliff; Ferguson, Jim; Meek, David; Mitten, Andy; Pilger, Sam; Taylor, Frank OBE; Tyrell, Tom (2001). The Official Manchester United Illustrated Encyclopedia. London: Manchester United Books. ISBN 0-233-99964-7.
- Shury, Alan; Landamore, Brian (2005). The Definitive Newton Heath F.C. SoccerData. ISBN 1-899468-16-1.
- Shury et al.; p.66
- Shury et al.; p.54
- Shury et al.; p.55
- Barnes et al.; p.83