This weekend’s fourth-round ties offer countless similar stories to Smith’s. Wigan could, conceivably, name a team at the Emirates that includes alumni of the academy systems at Liverpool, Everton, Tottenham, Fulham, Crystal Palace and Bournemouth. Grimsby’s squad contains graduates from Arsenal, West Ham and Manchester United, as well as Jude Soonsup-Bell, who played for both Spurs and Chelsea.