By Drew Austin Ask Karl Henry to name the greatest players he ever encountered and he has no hesitation in reeling off names like Wayne Rooney, Rio Ferdinand, John Terry, Eden Hazard and Steven Gerrard. He adds nostalgically: “But what a privilege it was to be on the same pitch as such world-class players! Never in a million years did I think I would have the career I’ve had.” The former Wolves captain – whose 574-game career took in all four English divisions – was in a reflective mood this week as he announced his retirement from a 20-year football…