Disclaimer: I've never even seen Rey Navarro play an inning of baseball and I probably wouldn't know him if I tripped over him. Also this is very unlikely to happen.
The case for Navarro: 24 year old former 3rd round pick in 2007. Has hit very well across two levels (AA, AAA) this season, and had a strong year in AA last year as well. Seemed to get it together all together at around age 22. Has hit 23 home runs and 46 doubles over his last 215 games. Does not strike out a whole lot. Is a switch hitter. Would be under team control for several years.
The case against Navarro: He's a 24 year old former 3rd round pick in 2007 who didn't start hitting at any sort of respectable rate until 2011. Does not walk much. Defense is an unknown (at least from my perspective) as there are various conflicting reports. Could be more of a second baseman than a shortstop.
The case for Cozart: He can play defense very well, and people seem to like him. Probably would not be a popular decision to jettison him. He's still cheap, for now.
The case against Cozart: He is kind of a human disaster at all non-defensive elements of baseball. He can't bunt, can't steal bases, can't make good baserunning decisions, can't walk, strikeouts a lot, doesn't hit for average, and now his power is gone. He even been out-slugged and thus out OPS'ed by the recently DFA'ed Darwin Barney.
What do you, the reader at home, think? Could Navarro be better than Cozart, and if it were up to you, would you give him the chance to be?