i wonder why more firstbasemen are not able to play third. it's a corner infield position that is roughly equivalent on that side of the diamon, though you need a stronger arm and will lilkely see more ground balls hit your way.
this is a very weak comparison, but i started off as a baseball player at third and transitioned to first - it was a very easy transition to make, and i wasn't near the elite athlete like most of these guys are. i wonder why the reverse doesn't happen more often. they tried it with trumbo, who wasn't awful at third, but i felt like they gave up too quickly on him. and some here may remember that pujols played some third base for the cardinals early on in his career.
just a thought.