The need to move Cozart up highlights another issue. The Reds need to sort out the SS/3B situation. They have the somewhat happy dilemma of not being able to move people up because the players at the next level are playing too well.
Frazier is still being used at SS because Francisco is also at Sarasota. At Chattanooga, Valaika is still being used at SS; Eymann has been moved to 3B where suddenly he has found a bat. At Louisville, I don't believe the Reds have given up on Janish at SS; at 3B Rosales has started to hit very well over the last month. Everything I have read indicates that the Reds are high on him. My sense is that most of these players would be moving through other systems more rapidly.