Sheffield Daily Telegraph – Wednesday 02 May 1928
Denaby Half-back for Derby
John William Barker, a centre-half of Denaby United, has been signed on by Derby County, and will join the club this week.
Barker is 21 years of age, stands 5ft. 10 ½ ins., and weighs 12 stone.
From Wikipedia:
John William “Jack” Barker (27 February 1906 – 20 January 1982) was an English footballer who played 327 league games for Derby County and won 11 England caps.