to my shame i've never heard of Johnny Crossan so i had a google, and what an odd back story.....
"When [Sunderland] made a substantial offer, Derry City offered Crossan a payment deal which he rejected, offering his own. When the Sunderland negotiations broke down, Derry City dropped Crossan, who signed for
Coleraine. Derry City ... reported themselves to the Football League authorities for technical breaches of regulations. In January 1959, a commission of inquiry imposed small fines on Derry and Coleraine, but
banned Crossan from all forms of football for life"
seems he went of to the Netherlands and only came back to the UK to City when they lifted his ban. So he was banned for life for wanting to move? is this the whole story? is this really how beholden to clubs players were pre-Bosman?