I'm not sure what "best receiving stats" or "age/experience" means exactly. When Gonzo was the same age as Kelce he had 8700 yards to Kelce's 6400. Kelce would have to average 1237 yards per year to catch him by the time he is 37. In the past remarkable 4 years, and in the middle of his prime and without much injury, he averaged 1182 per year. He got too late of a start to really threaten TG's career numbers I'm afraid. But he's one of the all time greats and his place in the Chiefs history book is set as one of the franchise's best ever.