Greene is a good player who is extremely hindered by playing in Petco. He'd also be replacing a player that isn't good. As to your "points": 1. Theriot bats right handed. Moot point. 2. Again, neither does Theriot. Except here, Greene has a lot of power for a SS and his numbers would improve at Wrigley. 3. Strike outs? Lame. 4. Batting Average? Super lame. 5. First, defense isn't near as important as offense. Second, errors aren't a good way to judge defense at all. Third, Greene made 11 errors last year at SS, Theriot 8 (and 11 overall). Plus, his number at Petco are pretty much even with Theriots total numbers. And Greene's numbers on the road destroy his numbers at home. I believe Meph showed a comparison that suggested he would be around .800-.820(low end) at Wrigley. I'd be interested to know just what parks elevate his road numbers so much. Petco isn't the only poor hitter's park in the NL West.