AP Photo/Michael Sohn

Is Michael Phelps the most-decorated Olympian ever? That's a definite.

Is he the greatest Olympian ever? That's up for some debate, of course, but he's surely in the discussion.

Has he lost one-third of his Olympic races? Just about, yes _ as surprising as that sounds.

But it's true.

After his presumed finale _ a win, of course _ on Saturday night Phelps has won 43 Olympic races out of 63 tries, with 12 second-places, six third-places, one fourth-place and one fifth-place finish.

For comparison, after his win to open his Rio competition in the 100-meter dash Saturday, Jamaican sprinting star Usain Bolt has raced 18 times in Olympic events, winning 16, finishing second once and fifth one other time.

Of course, many of those 20 "defeats" for Phelps in the pool were probably by design. The overwhelming majority came in heats and semifinals where the only objective was to advance. When he got to finals, Phelps almost always delivered with 28 medal finishes (23 gold, three silver, two bronze) in 30 opportunities.