I wonder if Colvin could play 1st? A Nady/Colvin platoon, perhaps? Guys move from left to right on the spectrum, and from the infield to the outfield. But I don't think there's much history of guys moving from outfield to infield, even first base. I think some have gone the 3B, LF, 1B route, but OF his entire life then IF? That would be tough.