He moved to Sunderland in November 1935, and the "Black Cats" went on to capture the English league title in 1936 with Morrison contributing 21 appearances. At the end of the season he vanished once again, leaving his wife and child behind in Sunderland with no source of income. It transpired that he had been working as a fruit picker in Cambridgeshire and playing for Gamlingay United in the local amateur league under the pseudonym of 'Jack Anderson'. He was arrested in December 1936 and appeared in court in Sunderland accused of leaving his wife and child chargeable to the public assistance committee, with the judge agreeing to dismiss the case when the relief funds paid to Mrs Morrison were refunded along with costs.