What is the name of the right fielder's name in the "Who's on First" routine?

It can be viewed here:

http://www.baseball-almanac.com/humor4.shtml


And here:

http://www.youtube.com/watch?v=sShMA85pv8M

the right fielder is either never identified, though an interpretation of the routine could give his name as "Naturally", or is Costello himself (this is incorrect, as he clearly states during the sketch, "You know, I'm a catcher too you know"). At a point in the routine, Costello thinks that Naturally is the first baseman (because NATURALLY, WHO would get the ball if was thrown to first base). However, in the board game, the right fielder's name is "Nobody".

https://en.wikipedia.org/wiki/Who's_on_First%3F