But Rice never took any time off during his career and swimming is easier on the body than pro football.

But it's all anecdotal, anyway. I could find some guy who was out of football by 30 and use that as "evidence" to support that Rice must have been doping for the last decade of his career. Or decide that Bob Beamon must have been on drugs when he jumped 29'2" and then went off them because nothing else could possibly explain why he never approached that mark again. You can drag anybody and everybody through the mud once you decide that evidence isn't required before making accusations.