 Complete the following phrase:  It was while at Chopwell that Waugh was spotted by Football League club Sheffield United who signed both Waugh and fellow defender Bill Sampy for a joint fee of 250 in April 1921. Waugh made a slow start to his career with the Blades and did not begin to feature regularly until November 1922, from which point he missed only one of the following 103 first team matches. Waugh was considered to lack pace and this caused him problems from 1925 when the offside rule was changed. A neck injury prevented Waugh from playing in the 