Re: Didi Gregorius
I don't see any reason to trade Didi or H-Rod unless they are being used as trade chips for a true difference maker like Upton, Zobrist, or Fowler. He is still a very young player and the Reds need to be in no rush to hurry him to the big-league roster.
If Cozart continues to develop offensively I don't see a problem with moving him to 3rd, Frazier to LF (once Ludwick leaves), Hamilton in CF and Didi at SS on Opening Day 2014. The Reds still have several viable options for their weaker position player spots and don't need to rush anyone.