He followed up by carrying 109 pounds to victory in the New Stands Handicap over ten furlongs at Pontefract and then finished second to Fred Power in the Dee Stakes at Chester.

[12] On 13 September Royal Lancer was stepped up sharply in class for the 147th St Leger over 14+1⁄2 furlongs at Doncaster Racecourse in which he was ridden by the seventeen-year-old apprentice jockey Robert "Bobby" Jones.

He started a 33/1 outsider in a twenty-two runner field headed by the French challenger Ramus, winner of the Prix du Jockey Club.

Lord Londale was pleased but surprised by the result, stating that the winner had been regarded as much inferior to his unplaced stablemate Diligence.

[15] Royal Lancer earned £14,522 in 1922,making him the most financially successful racehorse in the season ahead of Golden Myth, Captain Cuttle and Pogrom.

[17] At the end of his racing career, Royal Lancer was retired to become a breeding stallion at Lord Lonsdale's stud at Barleythorpe in Rutland.